這篇文章主要介紹了Python中excel和shp如何使用在matplotlib,具有一定借鑒價值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
關于excel和shp的使用在matplotlib
使用pandas 對excel進行簡單操作
使用cartopy 讀取shpfile 展示到matplotlib中
利用shpfile文件中的一些字段進行一些著色處理
#!/usr/bin/env python # -*- coding: utf-8 -*- # @File : map02.py # @Author: huifer # @Date : 2018/6/28 import folium import pandas as pd import requests import matplotlib.pyplot as plt import cartopy.crs as ccrs import zipfile import cartopy.io.shapereader as shaperead from matplotlib import cm from cartopy.mpl.ticker import LongitudeFormatter, LatitudeFormatter import os dataurl = "http://image.data.cma.cn/static/doc/A/A.0012.0001/SURF_CHN_MUL_HOR_STATION.xlsx" shpurl = "http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/cultural/ne_10m_admin_0_countries.zip" def download_file(url): """ 根據url下載文件 :param url: str """ r = requests.get(url, allow_redirects=True) try: open(url.split('/')[-1], 'wb').write(r.content) except Exception as e: print(e) def degree_conversion_decimal(x): """ 度分轉換成十進制 :param x: float :return: integer float """ integer = int(x) integer = integer + (x - integer) * 1.66666667 return integer def unzip(zip_path, out_path): """ 解壓zip :param zip_path:str :param out_path: str :return: """ zip_ref = zipfile.ZipFile(zip_path, 'r') zip_ref.extractall(out_path) zip_ref.close() def get_record(shp, key, value): countries = shp.records() result = [country for country in countries if country.attributes[key] == value] countries = shp.records() return result def read_excel(path): data = pd.read_excel(path) # print(data.head(10)) # 獲取幾行 # print(data.ix[data['省份']=='浙江',:].shape[0]) # 計數工具 # print(data.sort_values('觀測場拔海高度(米)',ascending=False).head(10))# 根據值排序 # 判斷經緯度是什么格式(度分 、 十進制) 判斷依據 %0.2f 是否大于60 # print(data['經度'].apply(lambda x:x-int(x)).sort_values(ascending=False).head()) # 結果判斷為度分保存 # 坐標處理 data['經度'] = data['經度'].apply(degree_conversion_decimal) data['緯度'] = data['緯度'].apply(degree_conversion_decimal) ax = plt.axes(projection=ccrs.PlateCarree()) ax.set_extent([70, 140, 15, 55]) ax.stock_img() ax.scatter(data['經度'], data['緯度'], s=0.3, c='g') # shp = shaperead.Reader('ne_10m_admin_0_countries/ne_10m_admin_0_countries.shp') # # 抽取函數 州:國家 # city_list = [country for country in countries if country.attributes['ADMIN'] == 'China'] # countries = shp.records() plt.savefig('test.png') plt.show() def gdp(shp_path): """ GDP 著色圖 :return: """ shp = shaperead.Reader(shp_path) cas = get_record(shp, 'SUBREGION', 'Central Asia') gdp = [r.attributes['GDP_MD_EST'] for r in cas] gdp_min = min(gdp) gdp_max = max(gdp) ax = plt.axes(projection=ccrs.PlateCarree()) ax.set_extent([45, 90, 35, 55]) for r in cas: color = cm.Greens((r.attributes['GDP_MD_EST'] - gdp_min) / (gdp_max - gdp_min)) ax.add_geometries(r.geometry, ccrs.PlateCarree(), facecolor=color, edgecolor='black', linewidth=0.5) ax.text(r.geometry.centroid.x, r.geometry.centroid.y, r.attributes['ADMIN'], horizontalalignment='center', verticalalignment='center', transform=ccrs.Geodetic()) ax.set_xticks([45, 55, 65, 75, 85], crs=ccrs.PlateCarree()) # x坐標標注 ax.set_yticks([35, 45, 55], crs=ccrs.PlateCarree()) # y 坐標標注 lon_formatter = LongitudeFormatter(zero_direction_label=True) lat_formatter = LatitudeFormatter() ax.xaxis.set_major_formatter(lon_formatter) ax.yaxis.set_major_formatter(lat_formatter) plt.title('GDP TEST') plt.savefig("gdb.png") plt.show() def run_excel(): if os.path.exists("SURF_CHN_MUL_HOR_STATION.xlsx"): read_excel("SURF_CHN_MUL_HOR_STATION.xlsx") else: download_file(dataurl) read_excel("SURF_CHN_MUL_HOR_STATION.xlsx") def run_shp(): if os.path.exists("ne_10m_admin_0_countries"): gdp("ne_10m_admin_0_countries/ne_10m_admin_0_countries.shp") else: download_file(shpurl) unzip('ne_10m_admin_0_countries.zip', "ne_10m_admin_0_countries") gdp("ne_10m_admin_0_countries/ne_10m_admin_0_countries.shp") if __name__ == '__main__': # download_file(dataurl) # download_file(shpurl) # cas = get_record('SUBREGION', 'Central Asia') # print([r.attributes['ADMIN'] for r in cas]) # read_excel('SURF_CHN_MUL_HOR_STATION.xlsx') # gdp() run_excel() run_shp()
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