Extracting point for polygons from shape file – not working
I am trying to extract the lat long points for the polygons from a shape file. I have followed the directions from the following links: Get list of coordinates for points in a layer? How to extract geo...
View ArticleVector -> Geometry Tools -> Extract Nodes equivalent in PyQGIS API
My question is fairly straight-forward. Would anyone know the PyQGIS equivalent of the Extract Nodes tool in QGIS? I don’t seem to find it in the API documentation. If you do, kindly share the...
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Soils sampling. How to make polygons from interpolated points?
My goal is to make a shape file with polygons for variable rate fertilizer application within a farm field. I have a point shape file with soil sample values (pH, P, K and so on) and a line/polygon...
View ArticleHow to convert multipoint geometry to ONE single point
I have an ArcGIS file geodatabase with two featureClasses. One is a point featureClass which represents the centroids of the cells of a regular grid. The second represents the corners of each grid...
View ArticlePostGIS: Geometry column registering as GeometryCollection, not converting to...
I’m trying to aggregate data from a tabular data source and then join it to a geometry file (sl_adm2) in PostGIS using a primary key. The geometry file was imported using shp2psql. CREATE TABLE...
View ArticleUsing Plat Plotter – Calculate Curve Table feature given an arc and radius
Plat Plotter has a Calculate Curve Table feature that generates a sequence of points for use in drawing plot lines. To put another way, it converts a curve into several short, straight segments...
View ArticleConverting polygon feature class to WKT for ArcGIS [duplicate]
This question already has an answer here: How to convert geometry to WKT using ArcPy? 4 answers
View Articleconverting shp to fileGDB with ogr2ogr changes geometry type?
I’m converting a shapefile to file geodatabase with GDAL 1.11.3 and the ESRI FileGDB driver. ogrinfo on the .shp gives: $ ogrinfo NED1_Index.shp INFO: Open of `NED1_Index.shp' using driver `ESRI...
View ArticleWRF Spherical Earth to WGS 84
Weather Research Forcasting Model assumes a spherical earth model with a radius of 6370km. I’m looking to display the data onto the WGS-84 Ellipsoid model as that is the model my system uses for its...
View ArticleHow to calculate tolerance for TopologyPreservingSimplifier in JTS?
I am trying to simplify some areal geometries (POLYGONMULTIPOLYGON) using JTS’s TopologyPreservingSimplifier.simplify(Geometry geom, double distanceTolerance) From the JavaDoc: void...
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