zoukankan      html  css  js  c++  java
  • FlatGeobuf 和 Geobuf


    参考:

    https://gdal.org/drivers/vector/flatgeobuf.html

    https://github.com/bjornharrtell/flatgeobuf


    https://github.com/mapbox/geobuf

    https://www.cnblogs.com/jyughynj/p/11567569.html


    Examples

    • Simple translation of a single shapefile into a FlatGeobuf file. The file ‘filename.fgb’ will be created with the features from abc.shp and attributes from abc.dbf. The file filename.fgb must not already exist, as it will be created.

      % ogr2ogr -f FlatGeobuf filename.fgb abc.shp
    • 
      
    • Conversion of a Geopackage file with multiple layers:

      % ogr2ogr -f FlatGeobuf my_fgb_dataset input.gpkg
    • 
      

    See Also


    • geojsonp — the prototype that led to this project
    • pygeobuf — Python implementation of Geobuf
    • twkb — a geospatial binary encoding that doesn't support topology and doesn't encode any non-geographic properties besides id
    • vector-tile-spec
    • topojson — an extension of GeoJSON that supports topology
    • WKT and WKB — popular in databases
    • EWKB — a popular superset of WKB


    修改源码:

    ! function (t, e) {
      if ("object" == typeof exports && "undefined" != typeof module) {
        e(exports, require("ol/Feature"), require("ol/geom/Point"), require("ol/geom/MultiPoint"), require("ol/geom/LineString"), require("ol/geom/MultiLineString"), require("ol/geom/Polygon"), require("ol/geom/MultiPolygon"));
      } else {
        //if ("function" == typeof define && define.amd) {
        //  define(["exports", "ol/Feature", "ol/geom/Point", "ol/geom/MultiPoint", "ol/geom/LineString", "ol/geom/MultiLineString", "ol/geom/Polygon", "ol/geom/MultiPolygon"], e);
        //} else {
          e((t = t || self).flatgeobuf = {}, t.ol.Feature, t.ol.geom.Point, t.ol.geom.MultiPoint, t.ol.geom.LineString, t.ol.geom.MultiLineString, t.ol.geom.Polygon, t.ol.geom.MultiPolygon);
        //}
      }
    }


    应用:

    import  'flatgeobuf';
    //import  flatgeobuf from 'flatgeobuf';
    
    //

    const response = await fetch('widgets/common/zonenavi/data/UScounties.fgb');

    for await (let feature of flatgeobuf.deserialize(response.body)) {

      feature.getGeometry().transform('EPSG:4326', 'EPSG:3857');

      this.addFeature(feature);

    }

  • 相关阅读:
    校园路的伤感
    IBM决赛的相片
    IBM一面blue面筋(D组)
    解读校园路
    learn english
    DoNews.COM确实不错
    ARC使用
    Mac 终端 加tab键索引功能
    制作越狱ios设备ipa包
    objc>JS通信及JS>objc通信
  • 原文地址:https://www.cnblogs.com/gispathfinder/p/13167445.html
Copyright © 2011-2022 走看看