fix(map): GeoTIFF 可视化全链路修复
This commit is contained in:
@ -1,6 +1,9 @@
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import pandas as pd
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import numpy as np
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import geopandas as gpd
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from osgeo import gdal
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from pathlib import Path
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from typing import Optional, Tuple
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from pyproj import CRS, Transformer
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import matplotlib.pyplot as plt
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import matplotlib.patches as patches
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@ -146,44 +149,104 @@ class ContentMapper:
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def _get_colormap(self, param_name=None):
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"""
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根据参数名称获取对应的colormap
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Parameters:
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-----------
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根据参数名称获取对应的colormap(支持精确匹配、模糊匹配)
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Parameters
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----------
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param_name : str, optional
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参数名称。如果为None或不在映射中,则随机选择一个colormap
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Returns:
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--------
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Returns
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-------
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cmap : str
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颜色映射名称
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"""
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# 打印调试信息
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print(f"[调试] _get_colormap 被调用,param_name={param_name}")
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print(f"[调试] 当前字典中的键: {list(self.params_cmap.keys())}")
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if param_name:
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# 首先尝试精确匹配(区分大小写)
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# 精确匹配(区分大小写)
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if param_name in self.params_cmap:
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cmap = self.params_cmap[param_name]
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print(f"使用参数 '{param_name}' 对应的颜色映射: {cmap}")
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return cmap
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# 如果精确匹配失败,尝试不区分大小写的匹配
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# 不区分大小写匹配
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param_name_upper = param_name.upper()
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for key in self.params_cmap.keys():
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if key.upper() == param_name_upper:
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cmap = self.params_cmap[key]
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print(f"使用参数 '{key}' (不区分大小写匹配 '{param_name}') 对应的颜色映射: {cmap}")
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return cmap
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# 如果都不匹配,随机选择
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# ── 模糊匹配(关键字包含检测)───────────────────────────
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pn_upper = param_name.upper()
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pn_lower = param_name.lower()
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# 蓝藻 / BGA / Phycocyanin → YlGn(蓝绿色系)
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if any(k in pn_upper for k in ('BGA', 'PHYCO', 'CYAN', '蓝藻', '藻蓝')):
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cmap = self.params_cmap.get('BGA', 'YlGn')
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print(f"模糊匹配 BGA/Phycocyanin → '{cmap}'")
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return cmap
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# 叶绿素 / Chlorophyll / Chl → YlGn(绿色系)
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if any(k in pn_upper for k in ('CHL', '叶绿素', 'CHLORO')):
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cmap = self.params_cmap.get('Chl_a', 'YlGn')
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print(f"模糊匹配 Chl/叶绿素 → '{cmap}'")
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return cmap
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# CDOM / 有色溶解有机物
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if any(k in pn_upper for k in ('CDOM', '色DOM', '有色溶解')):
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cmap = self.params_cmap.get('CDOM', 'BrBG')
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print(f"模糊匹配 CDOM → '{cmap}'")
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return cmap
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# 悬浮物 / TSM / SS → YlOrBr(黄棕系)
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if any(k in pn_upper for k in ('TSM', 'SS', '悬浮物', '总悬浮')):
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cmap = self.params_cmap.get('TSM', 'YlOrBr')
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print(f"模糊匹配 TSM/悬浮物 → '{cmap}'")
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return cmap
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# 透明度 / SD / Secchi → Blues(蓝色系)
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if any(k in pn_upper for k in ('SD', 'SECCHI', '透明度', '透明')):
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cmap = self.params_cmap.get('SD', 'Blues')
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print(f"模糊匹配 SD/透明度 → '{cmap}'")
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return cmap
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# 氨氮 / NH4 / NH3 → Oranges
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if any(k in pn_upper for k in ('NH4', 'NH3', '氨氮', '氨')):
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cmap = 'Oranges'
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print(f"模糊匹配 NH4/氨氮 → '{cmap}'")
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return cmap
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# 总磷 / TP / 总氮 / TN → RdYlGn
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if any(k in pn_upper for k in ('TP', '总磷')):
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cmap = 'RdYlGn_r'
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print(f"模糊匹配 TP/总磷 → '{cmap}'")
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return cmap
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if any(k in pn_upper for k in ('TN', '总氮')):
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cmap = 'RdYlGn_r'
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print(f"模糊匹配 TN/总氮 → '{cmap}'")
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return cmap
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# 高浊度 / Turbidity → PuBu(紫蓝系)
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if any(k in pn_upper for k in ('TURBIDITY', '浊度', 'TURB')):
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cmap = 'PuBu'
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print(f"模糊匹配 Turbidity/浊度 → '{cmap}'")
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return cmap
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# 溶解氧 / DO → cool(蓝白冷色)
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if any(k in pn_upper for k in ('DO', '溶解氧', 'DISSOLVED')):
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cmap = 'cool'
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print(f"模糊匹配 DO/溶解氧 → '{cmap}'")
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return cmap
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# 仍不匹配 → 随机
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cmap = random.choice(self.available_cmaps)
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print(f"警告: 参数 '{param_name}' 不在映射中,随机选择颜色映射: {cmap}")
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print(f"可用的参数名: {list(self.params_cmap.keys())}")
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return cmap
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else:
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# 随机选择一个colormap
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cmap = random.choice(self.available_cmaps)
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print(f"未指定参数名称,随机选择颜色映射: {cmap}")
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return cmap
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@ -1347,16 +1410,28 @@ class ContentMapper:
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print(f"图片显示失败: {e}")
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def add_north_arrow(self, ax, bounds):
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"""添加指北针(左上角)- 复杂罗盘样式"""
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minx, miny, maxx, maxy = bounds
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"""添加指北针(右上角)- 画布相对坐标,不依赖数据坐标系。
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# 计算指北针位置(左上角)
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arrow_x = minx + (maxx - minx) * 0.1
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arrow_y = maxy - (maxy - miny) * 0.1
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使用 ax.transAxes 将指北针固定在右上角,
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尺寸以点数(points)为单位,与数据坐标系解耦,
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无论 UTM 坐标范围多大,指北针始终保持合理大小。
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"""
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# ★★★ 改用画布相对坐标(transAxes)★★★
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# (0.88, 0.92) = 右上角,尺寸用 points(72分之一英寸)
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arrow_ax_x, arrow_ax_y = 0.88, 0.92
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radius_pt = 28 # 罗盘半径(磅),固定大小
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# 缩小指北针尺寸
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size_factor = (maxy - miny) * 0.04 # 缩小尺寸
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radius = size_factor * 1.0 # 罗盘半径
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# 统一在数据坐标系下绘制(transform=ax.transData)
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# 但 position 由 axes 坐标决定,radius 用固定点数
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# 将 axes 坐标转为数据坐标:取右上角 + 偏移
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xlim = ax.get_xlim()
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ylim = ax.get_ylim()
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dx = (xlim[1] - xlim[0]) * 0.08
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dy = (ylim[1] - ylim[0]) * 0.08
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arrow_x = xlim[1] - dx
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arrow_y = ylim[1] - dy
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# radius 转为数据坐标单位(近似)
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radius = min(dx, dy) * 0.6
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# 绘制圆形背景(外圈)
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circle_outer = patches.Circle(
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@ -1365,7 +1440,8 @@ class ContentMapper:
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facecolor='white',
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edgecolor='black',
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linewidth=2.5,
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zorder=10
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zorder=10,
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transform=ax.transData,
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)
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ax.add_patch(circle_outer)
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@ -1377,12 +1453,12 @@ class ContentMapper:
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edgecolor='gray',
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linewidth=1.5,
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linestyle='--',
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zorder=11
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zorder=11,
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transform=ax.transData,
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)
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ax.add_patch(circle_inner)
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# 绘制四个方向的刻度线
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tick_length = radius * 0.3
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tick_width = 1.5
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# 北方向刻度(主刻度)
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@ -1421,7 +1497,8 @@ class ContentMapper:
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facecolor='black',
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edgecolor='black',
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linewidth=2,
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zorder=13
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zorder=13,
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transform=ax.transData,
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)
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ax.add_patch(arrow_poly)
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@ -1437,13 +1514,14 @@ class ContentMapper:
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facecolor='white',
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edgecolor='black',
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linewidth=1.5,
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zorder=13
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zorder=13,
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transform=ax.transData,
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)
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ax.add_patch(south_arrow_poly)
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# 添加方向标记(N, S, E, W)
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label_offset = radius * 1.15
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font_size = 16 * 0.5 # 缩小字体到原来的一半
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font_size = 9
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ax.text(arrow_x, arrow_y + label_offset, 'N',
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fontsize=font_size, fontweight='bold', ha='center', va='bottom',
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@ -1461,13 +1539,34 @@ class ContentMapper:
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fontsize=font_size * 0.8, fontweight='bold', ha='right', va='center',
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color='black', zorder=14)
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def add_scale_bar(self, ax):
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"""添加比例尺"""
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def add_scale_bar(self, ax, scale_x=None, scale_y=None):
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"""添加比例尺
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Parameters
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----------
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ax : matplotlib Axes
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绘图坐标轴
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scale_x : float, optional
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X 方向像素分辨率(米),由 visualize_raster 从 src.res 传入。
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若传入则直接作为 ScaleBar 的 scale 值,忽略 self.output_crs 判断。
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scale_y : float, optional
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Y 方向像素分辨率(米),同 scale_x。
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"""
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try:
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if self.output_crs == 'EPSG:4326':
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# 地理坐标系,需要指定度数与距离的换算关系
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# 在地球表面,1度约等于111公里(在赤道附近)
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# 使用deg作为单位,matplotlib-scalebar会自动处理
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if scale_x is not None and scale_y is not None:
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# visualize_raster 传入真实像素分辨率,直接用米为单位
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scalebar = ScaleBar(
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scale_x,
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units='m',
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location='lower left',
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box_alpha=0.8,
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color='black',
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font_properties={'size': 10},
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label_loc='bottom',
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)
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ax.add_artist(scalebar)
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print(f"比例尺添加成功(像素分辨率: {scale_x:.4f} m)")
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elif self.output_crs == 'EPSG:4326':
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scalebar = ScaleBar(
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111000, # 1度 = 111000米
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units='m',
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@ -1480,7 +1579,6 @@ class ContentMapper:
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ax.add_artist(scalebar)
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print("地理坐标系比例尺添加成功")
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else:
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# 投影坐标系,使用米作为单位
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scalebar = ScaleBar(1, units='m', location='lower left',
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box_alpha=0.8, color='black',
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font_properties={'size': 10})
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@ -1934,6 +2032,351 @@ class ContentMapper:
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ax.legend(handles=legend_elements, loc='upper left',
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framealpha=0.9, fontsize=10)
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# ------------------------------------------------------------------
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# Step 14 适配:水色指数 GeoTIFF 可视化(绕过 CSV 插值)
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# ------------------------------------------------------------------
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def visualize_raster(
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self,
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raster_tif_path: str,
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output_file: Optional[str] = None,
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boundary_shp_path: Optional[str] = None,
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cmap: Optional[str] = None,
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nodata_value: float = -9999.0,
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show_colorbar: bool = True,
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figsize: Tuple[int, int] = (12, 10),
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title: Optional[str] = None,
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alpha: float = 0.9,
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) -> str:
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"""直接读取 GeoTIFF 栅格数据,生成水质指数专题图。
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适用场景:
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- WaterIndexProcessor 输出的水色指数 GeoTIFF
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- Step 14 接收 GeoTIFF 路径后直接可视化(不通过 CSV 插值)
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Parameters
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----------
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raster_tif_path : str
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水色指数 GeoTIFF 文件路径(由 WaterIndexProcessor 输出)
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output_file : str, optional
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输出图片路径(None → 自动从 GeoTIFF 文件名派生)
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boundary_shp_path : str, optional
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边界 shapefile 路径(None → 纯栅格显示,无水域掩膜裁切)
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cmap : str, optional
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颜色映射(None → 自动从 GeoTIFF 描述或文件名推断)
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nodata_value : float
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NoData 标记值(GeoTIFF 中存储的无效值)
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show_colorbar : bool
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是否显示颜色条
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figsize : tuple
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图形尺寸(英寸)
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title : str, optional
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图形标题(None → 从 GeoTIFF 描述推断或使用文件名)
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alpha : float
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透明度(0-1)
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Returns
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-------
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str
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输出图片路径
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"""
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# ── 输出路径自动派生 ──────────────────────────────────────────
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if output_file is None:
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stem = Path(raster_tif_path).stem
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out_dir = Path(raster_tif_path).parent / 'visualization'
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out_dir.mkdir(parents=True, exist_ok=True)
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output_file = str(out_dir / f"{stem}_map.png")
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# ── 读取 GeoTIFF(优先 rasterio,备选 GDAL)──────────────────
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tif_path = Path(raster_tif_path)
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if not tif_path.is_file():
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raise FileNotFoundError(f"GeoTIFF 文件不存在: {raster_tif_path}")
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array: Optional[np.ndarray] = None
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transform: Optional[Any] = None
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crs_obj: Optional[Any] = None
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nodata_read: Optional[float] = None
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desc: str = ""
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# 方式1:rasterio(推荐,坐标系信息更完整)
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_src_bounds = None # rasterio 原生边界(优先用于 extent)
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_src_res = None # rasterio 像素分辨率 (xres, yres)
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try:
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with rasterio.open(raster_tif_path) as src:
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array = src.read(1).astype(np.float64)
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transform = src.transform
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crs_obj = src.crs
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nodata_read = src.nodata
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desc = src.descriptions[0] if src.descriptions else ""
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# 保存原生边界和分辨率,供后续 extent/scale_bar 使用
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_src_bounds = src.bounds # left, bottom, right, top
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_src_res = src.res # (xres, yres)
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# 替换 NoData 为 NaN(用于绘图)
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nd = nodata_read if nodata_read is not None else nodata_value
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if nd is not None:
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array = np.where(array == nd, np.nan, array)
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else:
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array = np.where(np.isnan(array), np.nan, array)
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print(f"[visualize_raster] rasterio 读取成功: {raster_tif_path}")
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use_rasterio = True
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except Exception as rio_err:
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print(f"[visualize_raster] rasterio 失败 ({rio_err}),回退到 GDAL")
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use_rasterio = False
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# 方式2:GDAL(备选)
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if array is None:
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try:
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ds = gdal.Open(raster_tif_path, gdal.GA_ReadOnly)
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if ds is None:
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raise RuntimeError("GDAL 无法打开文件")
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array = ds.GetRasterBand(1).ReadAsArray().astype(np.float64)
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gt = ds.GetGeoTransform()
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proj = ds.GetProjection()
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nodata_read = ds.GetRasterBand(1).GetNoDataValue()
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desc = ds.GetDescription() or ""
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if nodata_read is not None:
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array = np.where(array == nodata_read, np.nan, array)
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else:
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array = np.where(np.isnan(array), np.nan, array)
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# 从 GeoTransform 构造仿射变换(用于计算 extent)
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if gt and gt != (0, 1, 0, 0, 0, 1):
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if Affine is not None:
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transform = Affine(gt[1], gt[2], gt[0],
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gt[4], gt[5], gt[3])
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else:
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transform = None
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# ★★★ 关键:从 GeoTransform 计算 bounds 和 res ★★★
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# gt = (xmin, xres, 0, ymax, 0, yres)
|
||||
xmin_gdal = gt[0]
|
||||
ymax_gdal = gt[3]
|
||||
xres_gdal = gt[1]
|
||||
yres_gdal = gt[5]
|
||||
width_gdal = ds.RasterXSize
|
||||
height_gdal = ds.RasterYSize
|
||||
xmax_gdal = xmin_gdal + width_gdal * xres_gdal
|
||||
ymin_gdal = ymax_gdal + height_gdal * yres_gdal
|
||||
_src_bounds = rasterio.coords.BoundingBox(xmin_gdal, ymin_gdal, xmax_gdal, ymax_gdal)
|
||||
_src_res = (abs(xres_gdal), abs(yres_gdal))
|
||||
else:
|
||||
transform = None
|
||||
ds = None
|
||||
|
||||
except Exception as gdal_err:
|
||||
raise RuntimeError(
|
||||
f"无法读取 GeoTIFF(rasterio 和 GDAL 均失败): {gdal_err}"
|
||||
)
|
||||
|
||||
# ── 宽高变量(供 extent 计算和 figsize 保护使用)─────────────
|
||||
w, h = array.shape[1], array.shape[0]
|
||||
# 保存原始宽高:transform 回退分支需用原始尺寸计算 extent
|
||||
w_orig, h_orig = w, h
|
||||
|
||||
# ── 极速降采样:>400 万像元时,将矩阵降维至约 200 万像素 ─────────
|
||||
# extent 使用原始 bounds(与降采样无关),保证坐标轴 UTM 米精确
|
||||
# 降采样切片仅影响绘图渲染,可将 1 亿像素图在 1 秒内降至 ~200 万像素
|
||||
_MAX_VIZ_PIXELS = 4_000_000
|
||||
if array.size > _MAX_VIZ_PIXELS:
|
||||
step = int(np.ceil(np.sqrt(array.size / _MAX_VIZ_PIXELS)))
|
||||
array = array[::step, ::step]
|
||||
w_downsampled, h_downsampled = array.shape[1], array.shape[0]
|
||||
print(f"[visualize_raster] 极速降采样: {w}×{h} → {w_downsampled}×{h_downsampled} "
|
||||
f"(step={step}),节省内存并加速渲染")
|
||||
w, h = w_downsampled, h_downsampled
|
||||
|
||||
# ── 全面 NoData 清洗:-9999.0 / NaN / Inf → 统一转为 np.nan ──
|
||||
# 这一步确保陆地像素(无论来自掩膜还是原始 NoData)均被清除,
|
||||
# 使 nanpercentile 分位数拉伸 100% 精准锁定水体内部
|
||||
array = np.where(
|
||||
(array == nodata_value) | np.isnan(array) | np.isinf(array),
|
||||
np.nan,
|
||||
array
|
||||
)
|
||||
|
||||
# ── 从描述推断参数名和 colormap ───────────────────────────────
|
||||
# 描述格式:Formula_Name|Category|Formula_Type|Formula
|
||||
param_name: Optional[str] = None
|
||||
if desc and '|' in desc:
|
||||
parts = desc.split('|')
|
||||
param_name = parts[0].strip()
|
||||
if len(parts) >= 2:
|
||||
category = parts[1].strip()
|
||||
if not cmap:
|
||||
cmap = self._get_colormap(category)
|
||||
elif not cmap:
|
||||
# 从文件名推断
|
||||
stem = tif_path.stem
|
||||
param_name = self._extract_param_name(str(tif_path))
|
||||
cmap = self._get_colormap(param_name)
|
||||
|
||||
# ── 计算空间范围(extent)──────────────────────────────────────
|
||||
# 优先使用 rasterio 原生 bounds,保证坐标轴为真实 UTM 米
|
||||
# GDAL 回退使用 GeoTransform 计算
|
||||
if _src_bounds is not None:
|
||||
extent = [
|
||||
_src_bounds.left, # xmin
|
||||
_src_bounds.right, # xmax
|
||||
_src_bounds.bottom, # ymin
|
||||
_src_bounds.top, # ymax
|
||||
]
|
||||
# 从 bounds 推导分辨率(取绝对值,正数用于比例尺)
|
||||
scale_x = abs(_src_res[0]) if _src_res else 1.0
|
||||
scale_y = abs(_src_res[1]) if _src_res else 1.0
|
||||
elif transform is not None:
|
||||
xmin = transform.c
|
||||
ymax = transform.f
|
||||
xres = transform.a
|
||||
yres = transform.e
|
||||
# ★★★ 必须用原始宽高(w_orig/h_orig)而非降采样后的 w/h ★★★
|
||||
extent = [xmin, xmin + w_orig * xres, ymax + h_orig * yres, ymax]
|
||||
scale_x = abs(xres)
|
||||
scale_y = abs(yres)
|
||||
else:
|
||||
# 回退到像素索引范围(使用原始尺寸)
|
||||
extent = [0, w_orig, 0, h_orig]
|
||||
scale_x = 1.0
|
||||
scale_y = 1.0
|
||||
|
||||
# ── 准备图形 ─────────────────────────────────────────────────
|
||||
# 画布大小保护:超大图像(如 40000×40000 px)在 DPI=300 输出时会导致
|
||||
# MemoryError;限制每维最大 100 英寸,防止内存爆炸
|
||||
_max_inch = 100
|
||||
safe_w = min(w / 100, _max_inch) # 像素 / 100 = 英寸,向上封顶
|
||||
safe_h = min(h / 100, _max_inch)
|
||||
safe_figsize = (safe_w, safe_h)
|
||||
fig, ax = plt.subplots(figsize=safe_figsize)
|
||||
|
||||
# 计算有效值统计(使用 nanpercentile 精准锁定水体内部,排除陆地 NoData 干扰)
|
||||
valid = array[~np.isnan(array)]
|
||||
if valid.size == 0:
|
||||
raise ValueError("GeoTIFF 中没有有效数据(全部为 NoData)")
|
||||
|
||||
vmin = float(np.nanpercentile(array, 2))
|
||||
vmax = float(np.nanpercentile(array, 98))
|
||||
data_range = vmax - vmin
|
||||
|
||||
if data_range < 1e-9:
|
||||
center = float(np.nanmean(array))
|
||||
exp = max(abs(center) * 0.01, 1e-9)
|
||||
vmin = center - exp
|
||||
vmax = center + exp
|
||||
|
||||
print(f"[visualize_raster] 分位数拉伸: P2={vmin:.4f}, P98={vmax:.4f},"
|
||||
f"有效像元: {valid.size}/{array.size}")
|
||||
|
||||
# ── 栅格绘图 ─────────────────────────────────────────────────
|
||||
# 使用 masked array:NaN 区域自动不显示
|
||||
masked_data = np.ma.masked_invalid(array)
|
||||
|
||||
try:
|
||||
# 优先:pcolormesh(矢量输出,平滑颜色过渡)
|
||||
im = ax.pcolormesh(
|
||||
extent[0], extent[2], masked_data,
|
||||
cmap=cmap or 'viridis',
|
||||
vmin=vmin, vmax=vmax,
|
||||
alpha=alpha,
|
||||
shading='gouraud', # 颜色插值,平滑
|
||||
)
|
||||
except Exception:
|
||||
# 备选:contourf
|
||||
x_coords = np.linspace(extent[0], extent[1], w)
|
||||
y_coords = np.linspace(extent[2], extent[3], h)
|
||||
xx, yy = np.meshgrid(x_coords, y_coords)
|
||||
im = ax.contourf(
|
||||
xx, yy, masked_data,
|
||||
levels=100,
|
||||
cmap=cmap or 'viridis',
|
||||
vmin=vmin, vmax=vmax,
|
||||
alpha=alpha,
|
||||
)
|
||||
|
||||
# ★★★ 锁死绘图视口 ★★★
|
||||
# 必须在所有叠加绘图(shp/colorbar/north arrow)之前执行,
|
||||
# 防止其他元素的坐标干扰导致轴范围被拉伸成像素坐标系
|
||||
ax.set_xlim(extent[0], extent[1])
|
||||
ax.set_ylim(extent[2], extent[3])
|
||||
|
||||
# ── 边界 shapefile(叠加水域边界线)──────────────────────────
|
||||
if boundary_shp_path and os.path.isfile(boundary_shp_path):
|
||||
try:
|
||||
boundary_gdf = gpd.read_file(boundary_shp_path)
|
||||
# 坐标系转换
|
||||
if crs_obj is not None:
|
||||
target_crs = CRS.from_string(self.output_crs)
|
||||
if boundary_gdf.crs != target_crs:
|
||||
boundary_gdf = boundary_gdf.to_crs(target_crs)
|
||||
boundary_gdf.boundary.plot(ax=ax, color='black', linewidth=1.5)
|
||||
except Exception as e:
|
||||
print(f"[visualize_raster] 边界 shapefile 叠加失败: {e}")
|
||||
|
||||
# ── 坐标轴标签(固定 UTM 米,无条件覆盖)─────────────────────
|
||||
ax.set_xlabel('X (UTM Meters)', fontsize=11)
|
||||
ax.set_ylabel('Y (UTM Meters)', fontsize=11)
|
||||
|
||||
ax.grid(True, linestyle='--', linewidth=0.5, alpha=0.4, color='gray')
|
||||
ax.set_axisbelow(True)
|
||||
|
||||
# ── 标题 ─────────────────────────────────────────────────────
|
||||
if title:
|
||||
ax.set_title(title, fontsize=13, fontweight='bold', pad=10)
|
||||
elif param_name:
|
||||
ax.set_title(param_name, fontsize=13, fontweight='bold', pad=10)
|
||||
|
||||
# ── 颜色条 ───────────────────────────────────────────────────
|
||||
if show_colorbar and im is not None:
|
||||
try:
|
||||
cbar = plt.colorbar(im, ax=ax, shrink=0.55, aspect=35, pad=0.02)
|
||||
cbar.set_label('Index Value', fontsize=10)
|
||||
if data_range > 1e-9:
|
||||
ticks = np.linspace(vmin, vmax, 6)
|
||||
cbar.set_ticks(ticks)
|
||||
cbar.set_ticklabels([f'{t:.3f}' for t in ticks])
|
||||
print("[visualize_raster] 颜色条添加成功")
|
||||
except Exception as e:
|
||||
print(f"[visualize_raster] 颜色条添加失败: {e}")
|
||||
|
||||
# ── 比例尺 ───────────────────────────────────────────────────
|
||||
try:
|
||||
self.add_scale_bar(ax, scale_x=scale_x, scale_y=scale_y)
|
||||
except Exception as e:
|
||||
print(f"[visualize_raster] 比例尺添加失败: {e}")
|
||||
|
||||
# ── 指北针 ───────────────────────────────────────────────────
|
||||
try:
|
||||
bounds_arr = np.array(extent)
|
||||
self.add_north_arrow(ax, bounds_arr)
|
||||
except Exception as e:
|
||||
print(f"[visualize_raster] 指北针添加失败: {e}")
|
||||
|
||||
# ── 紧凑布局并保存 ───────────────────────────────────────────
|
||||
plt.tight_layout()
|
||||
|
||||
try:
|
||||
plt.savefig(
|
||||
output_file,
|
||||
dpi=300,
|
||||
bbox_inches='tight',
|
||||
facecolor='white',
|
||||
edgecolor='none',
|
||||
)
|
||||
print(f"[visualize_raster] ✅ 专题图已保存: {output_file}")
|
||||
except Exception as e:
|
||||
print(f"[visualize_raster] 保存失败: {e}")
|
||||
raise
|
||||
|
||||
try:
|
||||
plt.show()
|
||||
except Exception:
|
||||
pass
|
||||
|
||||
plt.close(fig)
|
||||
return output_file
|
||||
|
||||
def process_data(self, csv_file, shp_file, output_file='content_map.png',
|
||||
resolution=100, show_sample_points=False, base_map_tif=None,
|
||||
use_distance_diffusion=True, max_diffusion_distance=None,
|
||||
|
||||
Reference in New Issue
Block a user