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16 lines
751 B
Plaintext
16 lines
751 B
Plaintext
title: $:/plugins/tiddlywiki/geospatial/docs/geolookup
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caption: geolookup operator
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tags: $:/tags/GeospatialDocs
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!! `geolookup` operator
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The `geolookup` operator identifies the polygon(s) within a [[GeoJSON Polygon Feature]] that correspond to a particular point, and returns the JSON properties of that polygon.
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Each input list item is interpreted as a [[GeoJSON Point Feature]] and the operand is interpreted as a [[GeoJSON Polygon Feature Collection]].
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For example, here we lookup the point 100.5,0.5 in the [[GeoJSON Polygon Feature Collection]] stored in the tiddler `TestData` and then extracts the indexes `0` and `animal` from the resulting JSON:
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```
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<$text text={{{ [geopoint[100.5],[0.5]geolookup{TestData}jsonget[0],[animal]] }}}/>
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```
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