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Esri / spatial-framework-for-hadoop

The Spatial Framework for Hadoop allows developers and data scientists to use the Hadoop data processing system for spatial data analysis.
Apache License 2.0
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Provide Generalize functionality #95

Open josephyannkaewang opened 8 years ago

josephyannkaewang commented 8 years ago

To speed up geo query, it will be nice if there is a way to check if the shape is simple and provide a way to convert a shape to its simplified version.

randallwhitman commented 8 years ago

Are you using Hive or custom Java MapReduce? The Geometry API has Simplify methods.

josephyannkaewang commented 8 years ago

I've tried

OGCGeometry ogcGeom = OGCGeometry.fromGeoJson(json); if (ogcGeom != null) { Geometry geometry = ogcGeom.getEsriGeometry(); SpatialReference spatialReference = ogcGeom.getEsriSpatialReference(); Geometry simpleGeometry = GeometryEngine.simplify(geometry, spatialReference); if (simpleGeometry != null && spatialReference != null) { OGCGeometry ogcGeom2 = OGCGeometry.createFromEsriGeometry(simpleGeometry, spatialReference); return GeometryUtils.geometryToEsriShapeBytesWritable(ogcGeom2); } }

GeometryEngine.simplify doesn't seem to take a parameter for specifying how much to simplify it by.

On Mon, Feb 8, 2016 at 2:02 PM, Randall Whitman notifications@github.com wrote:

Are you using Hive or custom Java MapReduce? The Geometry API has Simplify methods https://github.com/Esri/geometry-api-java/wiki#validation.

— Reply to this email directly or view it on GitHub https://github.com/Esri/spatial-framework-for-hadoop/issues/95#issuecomment-181578588 .

randallwhitman commented 8 years ago

Oh, the other meaning of Simplify, not in the sense of ST-IsSimple. Better to move the issue to Geometry API.

randallwhitman commented 8 years ago

In the geometry API, the requested operation is called Generalize.

randallwhitman commented 7 years ago

This is Open-Source and accepts contributions.