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GEE(Python版本)多源数据+数理统计网格化全球制图分析

  • 2026-04-02 05:45:34
GEE(Python版本)多源数据+数理统计网格化全球制图分析

GEE(Python版本)开展全球制图分析中有很多独特优势。除了无需下载数据、消耗配额以外,综合数理统计分析、网格化等制图技巧也是一大亮点。然而,要综合实现这些复杂的功能,需要对多维数据有较为深刻的理解,同时能够对处理好的数据进行数理统计分析。本文以Nature期刊图文为例,综合基于全国的土地利用数据统计分析+网格化制图内容。

1
Nature顶刊图文特色:
我们知道,很多顶级期刊都是做的大范围研究,甚至很多做的是全球范围的研究。有学员就好奇了:这种全球的数据难道需要我们自己下载以后出图吗?这么大的数据量,传统的GIS软件能打开制图分析吗?数据下载需要多久?于是,这便像大范围出图的一个拦路虎,传统出图方法已经无法解决。然而,我们经常看到那些绝美的顶刊论文的图,不仅漂亮美观,而且都是基于大范围乃至全球尺度的,例如:

Hansen M C, Potapov P V, Moore R, et al. High-resolution global maps of 21st-century forest cover change[J]. science

PekelJ F, Cottam A, Gorelick N, et al. High-resolution mapping of global surface water and its long-term changes[J]. Nature, 2016, 540(7633): 418-422.

KruitwagenL, Story K T, Friedrich J, et al. A global inventory of photovoltaic solar energy generating units[J]. Nature, 2021, 598(7882): 604-610.

2

基于GEE(Python)的可行性分析:

我们知道,GEE可以快速显示全球任意地球的数据,无论是单一数据还是多源数据的叠加,这为GEE大范围(全球)制图提供了思路。然而,GEE官网版本并没有制图分析功能,如何快速制作大范围,多源数理统计分析的格网化SCI论文图呢?这里,我们采用了GEE(Python)版本完美的解决了这个问题。首先,我们基于geemap加载地图和数据,完美的接入了GEE自带的数据,并且可以在这里实现数据处理和专题信息提取;其次,我们可以基于numpy、pandas等开展数理统计分析,而大范围的统计分析我们可以基于经纬度格网实现快速分析,最后用matplotlib和cartopy进行精美制图,这样一个完整的流程就实现了。
3

GEE(Python)多源数据+数理统计分析格网化结果展示:

我们以全国的土地利用分类数据为例,首先进行全国制图,核心代码如下:
fig = plt.figure(figsize=(1212), dpi=300, facecolor="white")# 关键:proj=projn 才是等面积投影制图的核心ax = cartoee.get_map(    imgBlend,    region=[142157055], # 当前版本 cartoee 的兼容写法    scale=500,    basemap = 'HYBRID',    zoom_level=3)# # 用经纬度范围约束投影地图显示区域ax.set_extent(rectangle_roi, crs=ccrs.PlateCarree())# 添加经纬网gl = ax.gridlines(    crs=ccrs.PlateCarree(),    draw_labels=True,    linewidth=0.6,    color='gray',    alpha=0.5,    linestyle='--')# 只显示左侧和底部标签(避免重叠)gl.top_labels = Falsegl.right_labels = Falselegend_elements = legend_elements = [    mpatches.Patch(facecolor=f'#{c}', edgecolor='none', label=lab)    for c, lab in zip(palette, labels)]cartoee.add_legend(ax,legend_elements=legend_elements,font_size=9,ncol=1,bbox_to_anchor=(1.001, -0.01))plt.show()
这样,我们得到全国的土地利用专题制图,结果显示如下:
我们需要在此基础上进行数理统计+网格化分析,实现经度和维度上的统计。这里我们以耕地信息为例,核心代码如下:
# -----------------------------# 经度方向:平滑均值 + 近似95%置信带# -----------------------------# 8. 经度方向统计# -----------------------------grid_lon_stats = grid_lon.map(zonal_cropland_area)df_lon = geemap.ee_to_df(grid_lon_stats)df_lon = df_lon[['xmin''cropland_m2''cropland_km2''cropland_ha']] \    .sort_values(by='xmin') \    .reset_index(drop=True)df_plot = df_lon.copy()# 滑动窗口大小,可调window = 5# 滑动均值df_plot['mean'] = df_plot['cropland_km2'].rolling(window=window, center=True, min_periods=1).mean()# 滑动标准差df_plot['std'] = df_plot['cropland_km2'].rolling(window=window, center=True, min_periods=1).std()# 标准误df_plot['sem'] = df_plot['std'] / np.sqrt(window)# 近似95%置信区间df_plot['upper'] = df_plot['mean'] + 1.96 * df_plot['sem']df_plot['lower'] = df_plot['mean'] - 1.96 * df_plot['sem']# 避免边缘 NaNdf_plot['std'] = df_plot['std'].fillna(0)df_plot['sem'] = df_plot['sem'].fillna(0)df_plot['upper'] = df_plot['upper'].fillna(df_plot['mean'])df_plot['lower'] = df_plot['lower'].fillna(df_plot['mean'])plt.figure(figsize=(126))# 原始折线plt.plot(    df_plot['xmin'],    df_plot['cropland_km2'],    color='#9ecae1',    linewidth=1.5,    alpha=0.7,    label='Original')# 平滑均值线plt.plot(    df_plot['xmin'],    df_plot['mean'],    color='#08519c',    linewidth=2.8,    label='Rolling mean')# 置信范围带plt.fill_between(    df_plot['xmin'],    df_plot['lower'],    df_plot['upper'],    color='#6baed6',    alpha=0.25,    label='95% CI')plt.xlabel('Longitude', fontsize=12)plt.ylabel('Cropland Area (km²)', fontsize=12)plt.title(f'MCD12Q1 Cropland Area by Longitude ({year})', fontsize=14)plt.grid(True, linestyle='--', alpha=0.3)plt.legend(frameon=False)plt.tight_layout()plt.show()
我们将经度和维度的统计信息进行制图生成,得到基于全国尺度的土地利用分类经纬度网格化SCI高级制图结果:
4

结束语:

这项研究当然不是只能全国的土地利用制图+统计网格化分析,对于所有的专题制图+数理统计网格化分析都适用。其次,我们还提到了基于GEE(Python版本)的高级制图方法,包括基础原理+颜色纹理阴影透明度、三维等多源数据叠加,生成属于自己科研的SCI精美图。
以上只是我们课程的一小章内容,你会发现我们的培训课程干货满满!感兴趣的可以咨询小编:

2026开学特惠 | GEE(Python版本)深度学习与全球制图分析实战特训教学

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  1. CONNECT:[ UseTime:0.000473s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000876s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000371s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000278s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000490s ]
  6. SELECT * FROM `set` [ RunTime:0.000218s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000576s ]
  8. SELECT * FROM `article` WHERE `id` = 483937 LIMIT 1 [ RunTime:0.000482s ]
  9. UPDATE `article` SET `lasttime` = 1775102457 WHERE `id` = 483937 [ RunTime:0.006226s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000239s ]
  11. SELECT * FROM `article` WHERE `id` < 483937 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000484s ]
  12. SELECT * FROM `article` WHERE `id` > 483937 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000516s ]
  13. SELECT * FROM `article` WHERE `id` < 483937 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000937s ]
  14. SELECT * FROM `article` WHERE `id` < 483937 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003912s ]
  15. SELECT * FROM `article` WHERE `id` < 483937 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001066s ]
0.084479s