JavaScript Library – Best Pure JavaScript Library for Geometry Operations

javascriptopen-source-gis

Does anyone know of a pure JavaScript library for doing geometry operations such as buffer, union, intersects, etc? I want to play with doing these operations in the browser. It looks like GeoScriptJS has some dependencies.

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I'm pretty much done with my port of JTS which is a pure JS port and it's available at https://github.com/bjornharrtell/jsts

At the current version (0.9.1) it supports the core functionality of JTS by which I mean predicates and overlays.

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Python Geometry Operations – Best Pure Python Libraries

I don't know about GAE compatibility, but you migh try SymPy for pure math & geometry functions. Otherwise, the only other one I know about is Shapely but it has a libgeos_c dependency which might disqualify it based on your requirements.

UPDATE: Also SymPy is BSD licensed, which might be an important benefit to some devs.

[GIS] Building SQL statement in javascript and casting variables as strings

An easy way to treat shedId as text will be

sql += "where subshed2.id = '" + shedId +"'";

simply putting single quotes around it. Without it PostGRESql would treat numbers as numbers and expect character data to be an identifier.

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[GIS] Building SQL statement in javascript and casting variables as strings

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