GDAL (Geospatial Data Abstraction Library) is an open source translator library & set of command-line utilities for processing raster spatial data formats. As a library, it presents a single abstract data model to the calling application for all supported formats. It also comes with a variety of ...

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Coarse heat map placement using gdal

I have generated a coarse heatmap of where data is available by 1 degree x 1 degree cells that I want to overlay on top of a world image. Using a python script I merged two images (heat map and a ...
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51 views

How do I link an existing install of GDAL to FileGDB in Linux?

The distribution I use (CentOS) only has GDAL 1.8 available through elgis. I've downloaded the FileGDB API from ESRI and I'd like to be able to link it after an install. How can I do this?
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173 views

How to use GDAL to burn a selected value from one raster into another?

I think this should be a relatively simple process, but I'm not quite sure how to approach it. I have a shapefile containing 1000's of polygons. I also have 19 rasters. All of the polygons fall ...
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101 views

OSGB36 referenced PNG to Google Earth

I am creating a PNG that is referenced to the OSGB36 datum (1 pixel per 50m easting/northing that is colored according to the result of some calculation code) I want to display this on Google Earth ...
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315 views

OGR-Driver GML axis order handling (GDAL, QGIS)

By default the OGR-Driver will swap the axis order to longitude, latitude for geographic coordinate systems. "Since OGR 1.8.0, the GML driver has coordinate system support. This is only reported ...
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77 views

Size of output geotiff file not as in the .vrt file

I have the following vrt file (input.vrt) with GCPs in EPSG:3857 <VRTDataset rasterXSize="5409" rasterYSize="5408"> <Metadata /> <Metadata domain="IMAGE_STRUCTURE"> <MDI ...
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102 views

VSIMalloc3() and UnifiedSrcDensity mask errors when running gdal_warp in OSGEO4w shell

This is related to gdal.py as part of bat script in windows 7 I am getting ERROR 2: VSIMalloc3(): Out of memory allocating 854522136 bytes. ERROR 2: Out of memory allocating 119813400 bytes ...
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249 views

ArcGIS 10.1 crashes when a button in an addin invokes GDAL DLL through SWIG CSharp wrapper

I am developing an addin with a button that tries to do coordinate transformation using GDAL OSR. When I create a new CoordinateTransformation object ArcMap crashes and close. If a debug against a ...
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76 views

resampling errors

I have to reproject my images, but it contains some resampling errors. Any one has any idea on significance of resampling error. Are they neglectable? Is there any good documentation to refer to? I'll ...
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71 views

Create 6 band IMG file with GDAL out of two JPG files, one with WorldFile coordinates

I have two JPG files 1 ortomap: http://imageshack.us/photo/my-images/703/ortofoto1.jpg/ with WorldFile: 0.683772574816354 0.000000000000000 0.000000000000000 -0.683739485024190 ...
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143 views

`gdalbuildvrt` and selecting individual bands

I want to produce a set of VRTs (GDAL's internal virtual rasters) that comprise a re-arrangement of bands of a number of individual GeoTIFF files. Say I have my initial set of GeTIFF files, all having ...
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89 views

Calculating tiles extents using some level data

I have some data looking like this: <?xml version="1.0" encoding="utf-8"?> <levels> <level nr="0" tileWidth="512" tileHeight="512" envSizeX="5000" envSizeY="5000" minX="465000" ...
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220 views

Homebrew GDAL installation ECW or MrSID

I have experimented with installing gdal 1.9.1 via homebrew. It works wonderfully. Unfortunately, their is no real JP2000 support. I realize that JP2000 is supported by OpenJp2000, but that ...
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162 views

gdallocationinfo from C++?

I need a C++ API to convert x,y Image Coordinates in their native projection to output image pixel,line coordnates. I see the gdallocationinfo documentation, but no API for it. Where in online GDAL ...
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122 views

Is Django's LayerMapping capable of putting a static value into all features?

I'm using GeoDjango's LayerMapping utility to try and import a set of features. The catch is that aside from the attributes in the source layer, I want all the destination features to have the same ...
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293 views

ValueError when reading a raster band as a numpy array

Here's the problem shown in Python shell: In [32]: from osgeo import gdal In [33]: geotiff = '/Users/calvin/work/luc/proj_public/media/GLO ...
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136 views

Geoserver Custom CRS IAU_Moon_2000

I am trying to setup a custom basemap using a GTiff in the IAU's Moon2000 projection (30100 or 30101). The basemap image was originally created through gdal_merge and gdalinfo returns the expected, ...
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24 views

How do I get polygon coordinates from shape files?

I have a shapefile that only has area and length data for the shapes, but I need to get the polygon coordinates. I've tried re-projecting with GDAL (at least I think that is what I did here) my ...
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13 views

Trouble with r.out.gdal in GRASS GIS

I'm processing some landsat 8 files. I'm using this scene LC82260982013325LGN00 and I have to apply i.landsat.toar and export the result as a GTiff. However when I use r.out.gdal it takes a very long ...
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10 views

GDAL: Update spreadsheet from polygons in a shapefile

I am a beginner with GIS data, and have been looking for an answer but have not yet found it. I have a spreadsheet with lat/long points. I also have a shapefile with several numbered polygons over a ...
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25 views

Polygonize only pixel values of 1 from a raster

I have a raster mask that I have created in QGIS (2.2.0) that consist of 0, 1 and nodata values. I would like to end up with a polygon dataset that consist of only the value of one pixels from this ...
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18 views

Gdal_Calc.py random pixel error

I'm using the gdal_calc.py in python in order to do the same thing as the Con tool in ArcGIS. I'm calling the .py using os.system: os.system('gdal_calc.py -A%s -B%s --outfile=%s ...
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13 views

Optimize Tilemill export of project with contour-lines

I have a project in Tilemill (based on OSM-Bright) that covers Europe and also displays Contour-Lines. My problem is that the performance is pretty bad when exporting my map. I've already seen that ...
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15 views

Combine overlapping rasters in gdal_calc.py, taking the maximum value from each pixel?

I want to combine 3 overlapping rasters to create 1 raster. Each have the same dimensions, resolution and CRS. I want to populate the new raster with the maximum value from each of the layers. ...
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25 views

GDAL Installation help in windows

I'm trying to build a GIS application in Django Framework. I completed the GeoDjango installtion (postresql, spatial libraries). I installed OSgeo4W in my C drive. I also setup environment ...
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12 views

Opening Spot 5 DIMAP imagery in GDAL

Would like to know if someone is familiar of opening SPOT 5 DIMAP imagery using GDAL. Though the GDAL provides DIMAP driver, when I tried to open, it can not show the geotransform and geoprojection.
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58 views

I cannot use Gdal Python but Gdal binary, how to fix?

**UPDATE: I can use GDAL with Python now by copy file from Gdal 1.11 compiled folder to Python package folder. But the problem with GDAL binary and GDAL library that they cannot read the HDF5 file. ...
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34 views

How can you calculate the union/merge two polygons in ogr2ogr?

I want to calculate the union/merge two overlapping polygons using ogr2ogr (as I have 300+ to do). I want the output to be the same as you would get if you used the 'Merge shapefiles to one' command ...
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34 views

How do I convert a .bil (and associated .clr, .blw, .hdr, and .stx) files into georeferenced rasters in R? OR to geotiffs using gdal_translate?

The title says it all. I've got a bunch of .bil files, which I can open in R using the raster command pointed to the path to the .bil file. But I don't know how to efficiently incorporate the ...
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13 views

Gamma correcting ECW

we would like to modify an existing ECW file with a gamma correction in order to make the image less colourful. Is there a way to do this using e.g. GDAL?
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55 views

What is GDAL equivalent to ArcGIS Lookup (Spatial Analyst) tool?

I use the Lookup (Spatial Analyst) tool to create several raster layers from a combined raster layer. I know ArcPy can do the same thing. However, I would like to know whether GDAL (or another ...
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38 views

gdal read whole geotif band into vector

i have another c++ GDAL question. I try to read alle elevation data out of an GeoTiff file into a c++ vector so that i can get elevation at x,y like this: vector[x][y]. I also like to use this data to ...
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22 views

How do I convert a VMAP to a shapefile using GDAL?

This is my first time trying to convert a VMAP to a shapefile and the examples online aren't as straightforward to me. Any guidance is appreciated.
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25 views

SST process using just GDAL and python

I am trying to process AVHRR 4km SST using a module that uses only GDAL and Python. OSGEO4W, GDAL, Python 3.4.1. I borrowed the download code from http://grasswiki.osgeo.org/wiki/AVHRR. The rest I ...
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78 views

libgdal1 and libgdal1h conflict

I am on Ubuntu 14.04. When I am installing PostGIS-2.1, it's asking for libgdal1 library. But when I am installing libgdal1, it's removing grass and gdal. Can someone please guide me how to install ...
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32 views

Using gdal inside matlab in ubuntu

I'm trying to use the gdal_rasterize inside matlab via unix or system matlab command system('gdal_rasterize'). Despite that this command is working in my console terminal I got yhe following error ...
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44 views

Polygonize a raster using GDAL JAVA bindings - passing raster pixel value to the resulting feature

I have a raster GeoTIFF file with values from 0 to let's say 5. When I run gdal.polygonize (I'm working with JAVA and GDAL bindings to JAVA) on it, I get features with corresponding polygons. The ...
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23 views

Comparing datums with GDAL/OGR

I have a bit of code in Java that takes in a SpatialReference object and checks that it is one of the acceptable datums (WGS84, NAD83, NAD83 HARN, NAD27), but because of the lack of standardization in ...
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69 views

How to import SRTM data for the whole planet into TileMill

I need to get SRTM elevation data for the whole planet into TileMill. I already walked through the instructions on Steve Bennett's blog and it worked fine for small areas. The problem is now that for ...
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57 views

Snag loading Gdal 1.11 for Qgis 2.2, on a Mac

Can't load Q2.2 on a Mac without Gdal 1.11. but when I try to load 1.11 'Complete' version, it fails and gives me an error message to contact the developer. Anyone else had this kind of trouble? ...
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24 views

gdal_retile: to tile or pyramid only

I'm having trouble understanding when to use the -pyramidOnly option in gdal_retile. If I am trying to tile 10 GeoTiffs, am I right in assuming that if the images contain overlays and or inner tiles ...
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48 views

gdal commands cannot import gdal — possibly ArcGis conflict with separate Python?

I installed ArcGIS 10.1 yesterday (Windows 7 64-bit), but have a separate Python 2.7 installation. Now my gdal does not work correctly anymore. It looks like all commands without the ending "*.py" ...
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24 views

How to prevent transparent borders (collars) of a tif wipe out overlapping regions of adjecent tif while using gdalbuildvrt

I have a set of Geotifs that have got transparent borders (collars) of irregular shapes & dimensions around them. First I created a VRT over this set of Geotifs through gdalbuildvrt. Then I ...
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25 views

Using GDAL and Python to replace the Spatial Analyst TabulateArea method

Has anyone tried to phase out the use of ESRI's Spatial Analyst extension by replacing it with GDAL in Python? I have a script that only uses the TabulateArea and Statistics analysis but not much else ...
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20 views

gdal_grid data from 2 different utm zone

I'm developing a component which grid data over Vietnam region using gdal_grid from gdal. Follow gdal example I've successfully griding data within 1 specific UTM zone. However, for data over the ...
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50 views

MODIS products reprojection problem

I am working with Modis Data (MOD02, MOD11, MOD03, MOD35). In particular I am looking for a solution to reproject the subdatasets below, into albers equal. Because I am using NLCD dataset which uses ...
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71 views

GDAL HDF not recognized as supported file

I am having the same issues as in this thread; however, I'm new to programming and need more advice on how to get gdal to open hdf files. I downloaded hdf from MODIS, which I believe are hdf 4. I have ...
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37 views

need help creating layer with geom type wkbGeometryCollection with gdal python

I am having trouble creating a layer with geom type as geometry collection. Thus I am unable to output to a shapefile. I have attached code below. dstLayer is null. This does not happen if geom type ...
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42 views

Import GRD and count days with temperature below zero, using python

Minimum temperature of a year is given in GRD file. I have to read that file and then calculate the frost day (less than zero degrees celcius) from it in python.
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61 views

aggregate counts on a grid and determine grid adjacency

So here is the problem I am working on. I have a bunch of lat, long coordinates for event occurrences. I want to create a grid and then count how many points fall into each grid pixel. Once I have ...