Python中GeoJson和bokeh-1的使用讲解

Python  /  管理员 发布于 7年前   151

GeoJson 文档

{ "type": "FeatureCollection", "features": [  {   "geometry": {    "type": "Polygon",    "coordinates": [     [      [       3,       1      ],      [       3,       2      ],      [       4,       2      ],      [       4,       1      ],      [       3,       1      ]     ]    ]   },   "type": "Feature",   "properties": {    "perimeter": 0,    "vista": "mim",    "provincia": "右侧正方形",    "objectid": 24,    "prov": 0,    "bounds": [     0,     0    ],    "provif3_": 27.0,    "ogc_fid": 26,    "provif3_id": 26.0   }  },  {   "geometry": {    "type": "Polygon",    "coordinates": [     [      [       1,       1      ],      [       1,       2      ],      [       2,       2      ],      [       2,       1      ],      [       1,       1      ]     ]    ]   },   "type": "Feature",   "properties": {    "perimeter": 0,    "vista": "mim",    "provincia": "左侧正方形",    "objectid": 24,    "prov": 0,    "bounds": [     0,     0    ],    "provif3_": 27.0,    "ogc_fid": 26,    "provif3_id": 26.0   }  } ]}

from bokeh.io import show, output_notebook, output_filefrom bokeh.models import (  GeoJSONDataSource,  HoverTool,  LinearColorMapper)from bokeh.plotting import figurefrom bokeh.palettes import Viridis6with open(r'argentina.json', 'r', encoding='utf8') as f:  geo_source = GeoJSONDataSource(geojson=f.read())color_mapper = LinearColorMapper(palette=Viridis6)TOOLS = "pan,wheel_zoom,box_zoom,reset,hover,save"p = figure(title="正方形", tools=TOOLS, x_range=[1, 10], y_range=[1, 10], width=500, height=500)p.grid.grid_line_color = Nonep.patches('xs', 'ys', fill_alpha=0.7, fill_color={'field': 'objectid', 'transform': color_mapper},     line_color='white', line_width=0.5, source=geo_source)hover = p.select_one(HoverTool)hover.point_policy = "follow_mouse"hover.tooltips = [("Provincia:", "@provincia")]output_file("test.html", title="Testing Polygon in bokeh")show(p)

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