插件GitHub地址:https://github.com/thangqd/HCMGIS。
以下对HCMGIS插件进行简单介绍,并演示如何进行地图数据下载。
插件简介
HCMGIS - Basemaps, Download OpenData, Batch Converter, VN-2000 Projections, and Field Calculation Utilities for QGIS 3。
- Basemap(基础底图加载): Add raster and vector basemaps from Google, Carto, ESRI, OSM Stamen, Vgrid, etc.
- Batch Converter(批量转换器): Batch convert CSV to Point Shapefile and other GIS formats (including OSM pbf, GeoPackage) in a folder and its subfolders;
- Download OpenData(下载开放数据): Download Open Data from OSM Geofabrik, GADM, Who's On First (WOF), Microsoft Building Footprints, HCMGIS OpenData, Open Development Mekong, World Food Programme, Standford University, ect.
- Vn-2000 Projections(Vn-2000投影坐标): Look up EPSG Code for Vn-2000/ TM3 Projections for all Provinces in Vietnam
- Spatial Processing(空间处理): has been moved to BecaGIS Plugin since Sep, 2024
- Create Skeleton/Medial Axis/ Centerline for road/ river networks and similar linear structures
- Finding closest/ farthest pair of Points in a Point set based on Voronoi Diagram
- Finding Largest Empty Circle of a Point set
- Attribute Calculation(属性计算): merge/ split data fields, Vietnamese Font Converter: Unicode <-> TCVN3 <-> Vni-Windows, UPPER CASE, lower case
插件安装
打开QGIS——>插件——>管理并安装插件,搜索“”,点击“安装”即可。
我这里已经安装好了。
使用插件
以下使用插件加载在线地图服务,以“ArcGIS影像底图”为例,
在顶部找到“HCMGIS”,选择“Basemaps->ESRI Imagery”,即可加载ESRI的影像地图服务。
加载结果如下,
下载底图
接下来,尝试下载指定区域的地图数据,以“西安市”为例(矢量数据可以从DataV.GeoAtlas地理小工具系列下载),右键“ESRI Imagery”图层,选择“导出->另存为”,并填写“文件名”,选择“范围”,可以从预先下载好的矢量数据范围中进行计算,设置完毕之后,点击ok即可进行下载,并得到对应的geotiff影像地图文件。