[gdal-dev] grid from point dataset without interpolation

2010-01-27 Thread Matthew Snape
Hi, I have a set of points in a shapefile that represent gridded height data. I would like to convert them to a raster without using any interpolation, merely using each point as the centre of a cell. I have tried using gdal_grid with the nearest algorithm but this appears very slow. Is there

[gdal-dev] rotate raster cells

2011-04-11 Thread Matthew Snape
I have a raster that I wish to rotate. I would like to retain the projection but create grid cells that are not aligned in the X and Y planes. Is it possible to use GDAL to make such a translation, and do drivers have support for representing data in such a way? This e-mail message and any attac

[gdal-dev] layer union returns a geometry collection

2018-02-12 Thread Matthew Snape
Hello, I am performing a union of two layers using OGR from Python... layerA.Union(layerB, layerC,["PROMOTE_TO_MULTI=YES",]) This returns a layer composed of multipolygon's except for a single geometrycollection in the form... GEOMETRYCOLLECTION (POINT (2610469.66 3325023.52),POLYGON ((261043

[gdal-dev] problem with ogr2ogr

2009-04-27 Thread Matthew Snape
Dear List, I am attempting to use ogr2ogr to append a shapefile to another shapefile. However, when the -update parameter is included the incorrect source filename appears to be used. ogr2ogr -append -update -select meta_type,meta_id,meta_name "C:/downloadworking/out.shp" "SSSI/sssi.shp"

RE: [gdal-dev] Distributed processing

2009-06-12 Thread Matthew Snape
Hi, We currently do parallel execution of ArGIS geoprocessing tools, although not yet with GDAL. We use IPython to execute normal commands in parallel. IPython is a shell replacement that has parallel commands that can be used from the shell or within code. The biggest difficulty I have found

RE: [gdal-dev] convert kmz to shapefiles

2009-06-24 Thread Matthew Snape
Have you tried decompressing the kmz and then converting the doc.kml? -Original Message- From: gdal-dev-boun...@lists.osgeo.org [mailto:gdal-dev-boun...@lists.osgeo.org] On Behalf Of maning sambale Sent: 24 June 2009 11:00 To: gdal-dev@lists.osgeo.org Subject: [gdal-dev] convert kmz to sh