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Geographic Information Systems
Vanni Zhang's user avatar
Vanni Zhang's user avatar
Vanni Zhang's user avatar
Vanni Zhang
  • Member for 12 years, 4 months
  • Last seen more than 7 years ago
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I am a product engineer at Esri. I am interested in geospatial data visualization and making web mapping apps.

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17
Free tile provider for Leaflet
7
Get the width and height of a rectangular polygon in PostGIS
6
Convert geometry to latitude-longitude using PostGIS ST_Transform
5
Add bunch of numbered locations?