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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How to transform World data from EPSG 4326 to EPSG 3857

I have tryed different opensource tools to transform a world data shapefile from 4326 to 3857 but I always have an error. Im not sure, but is it because of Antartica? I have tryed with GDAL and QGIS ...
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100 views

How do I get the domain from an OGRSpatialReference?

I would like to know what the projected bounds are for a spatial reference using OGRSpatialReference. Is there some way to use the GetProjParm method to get this information? An example of what I'...
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137 views

What's regular blocking arrangement ? (GDAL)

I am using GDAL tools to retrieve PostGiS raster. The code(command line) I am using is as follows : gdal_translate -of AAIGrid "PG:host=localhost dbname='database' user='postgres' password='admin' ...
3
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452 views

How to set a spatial filter with Python/GDAL?

Is there a way with GDAL (Python) to set a spatial filter (bounding-box) on a raster before I process it? I want to read it as an array. BandReadAsArray(band, xoff=0, yoff=0, win_xsize=None, ...
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GDAL Plugin with a different version of GDAL aready built into QGIS

My qgis windows version is 1.8.0 Lisboa and use the gdaltools in version1.9.2. I want to use the plugin NetCDFBrowser, but this plugin need the gdal 1.10. I install 1.10 stand-alone gdal found here ...
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2answers
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Getting started with gdal/ogr

I found some batch code using ogr2ogr in order to convert and reproject vector layers. The difficulty for me is to know what to install and which gdal commandline should I use, and how to configure it....
3
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1answer
283 views

Using the C++ GDAL API how do I set the GDAL_DATA path?

If I want to change the directory of the GDAL_DATA path or point to a different version of a csv file for EPSG numbers how do I do that using the C++ API?
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How to calculate Image boundary / footprint of satellite images using open source tools?

I'm referring to this question&discussion: How do I create a shapefile showing footprints of Rasters? I need to create the polygon outlines of several single layer raster images, not the extent/...
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Python - OGR: Transform coordinates from meter to decimal degrees

I have a point in a shapefile. The shapefile is in a WGS_1984_Web_Mercator Projected Coordinate System. I want to get the coordinates of that point in decimal degrees with GDAL/OGR in Python. I am ...
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216 views

Problem installing GDAL and fiona module in arcmap10? [closed]

I am getting message like this Traceback (most recent call last): File "", line 1, in File "C:\Python26\ArcGIS10.0\lib\site-packages\gdal.py", line 2, in from osgeo.gdal import ...
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21 views

Is there a way to tell the supported input formats of libmap.dll without the associated .exe?

I have only compiled Mapscript_csharp and supporting dlls used in a .NET application - not the executables. Is there a way to tell what input / output formats are supported by these dlls?
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801 views

Reprojection problem with gdalwarp

I have a GeoTiff file with WGS84 datum projection and I'm trying to reproject it using gdalwarp. Using this command gdalwarp -t_srs '+proj=tpers +azi=19 +tilt=30 +lon_0=-109.5 +lat_0=23 +h=1274199.4 ...
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1answer
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How do I add elevation data to a GeoJSON line from a GPX file?

I understand that elevation can be added as an optional third value in Coordinates (lat, long, elev) in a geojson file, but I can't find a way to actually do that from a gpx file. I've used ogr2ogr to ...
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1answer
36 views

GDAL: What is the best way to test if a CPLString is not empty?

If I define a CPLString this way: CPLString osString; And I want to check if osString is not empty, what would be the best way? My bet: if (osString.c_str() == NULL) But I find it a little ...
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2answers
467 views

informations about “gdaltransform” utility of GDAL

I have a doubt about GDAL reprojection. I use "gdalwarp" utility to reproject an image in a specific projection system (for example WGS84 UTM49). "gdalinfo" on original image displays this corner ...
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1answer
295 views

Python GDAL: find out spikes and pits in DEM

I'm working with on a DEM (Geotiff) in Python GDAL, and I'd like to find out the spikes or pits in my terrain. I have no idea how to proceed, does anyone have good algorithm to help me out? Thanks, eo
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807 views

How to set GDAL/cs2cs/proj to use NTv2 grid shift file when using EPSG codes?

I am using the GDAL API for Python for a script that takes only EPSG codes for inputs to specify source and target coordinate systems. While the cs2cs command seems to handle quite well ...
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144 views

Python GDAL/OGR: check lines geometries connectivity

I'm working with shapefiles representing roads, so basically it's stored as (poly)lines. I need to perform a road connectivity checking. In other words, I want to ensure that roads meant to ...
3
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1answer
179 views

Where can I find a python GDAL 1.8.0 package?

I have python 2.7.4 installed on my RHEL 5 machine along with gdal-devel-1.8.0 and gdal-1.8.0. I tried to install the GDAL 1.9.1 package available on python's page (https://pypi.python.org/pypi/GDAL/1....
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1answer
694 views

Installation of GDAL 1.10 in Windows 8 and Ubuntu 12.04 [duplicate]

Is there an easy way to install GDAL/OGR 1.10 in Windows 8 and Ubuntu 12.04.
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1answer
245 views

setup Mapserver WMS from tile files

I'm totally new to Mapserver and I've been banging my head trying to figure out how to mount a WMS server that will seed images of a small geographical area to a OpenLayers HTML page. I already ...
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1answer
2k views

circle detection on binary image

My image is gray scale image which i have converted to binary by smoothing and then edge detection method. Now i want to place the circle /ellipse on edge detected. I don't know how to proceed further....
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2answers
782 views

Why gdalwarp cannot make transparent black nodata?

I have a MODIS ariel image geotiff and I want to remove black nodata pixel (this is Aerosol Of Thickness) 1 band image. I've done like this C:>convert -transparent black MOD04.A2003226.0325.006....
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GDAL/Python: How do I get coordinate system name from SpatialReference?

In Python, using GDAL, I've extracted a raster's projection as a WKT string as follows: wkt = dataset.GetProjection() # wkt is 'PROJCS["GDA_1994_Transverse_Mercator",GEOGCS["GDA_1994",DATUM["GDA_1994"...
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1answer
371 views

python gdal_polygonize error

I am trying to use gdal_polygonize to create a polygon from a binary raster. My code is: os.system('gdal_polygonize.py ' + filename + ' -f ESRI Shapefile ' + shapefile) where filename is a string ...
2
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1answer
193 views

OGR UnionCascaded gives strange lines (flat polygons)

I'm using OGR to perform a union using UnionCascaded. All my polygons have been created by GDAL polygonize which ensures that all polygons follow pixel edges and should therefore align nicely. But I ...
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1answer
283 views

CSV and GDAL 1.10 in QGIS

It seems the GDAL upgrade from 1.9 to 1.10 changed the way CSV files are handled so that I now have a non-functioning QGIS. App hangs trying to import csv data file when previously had no problems ...
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0answers
944 views

Using gdal to convert from UTM to equidistant lat/lon

I am getting rather confused with converting a UTM gridded dataset into a equidistant/rectangular latlon gridded dataset. Can anybody help me? I have a UTM set with the following projection: PROJCS["...
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206 views

QGIS GDAL polygonize - how to set scale

I've got some old contour plots, paper copy only, that I'd like to be able to put into QGIS. I get as far as a successful polygonize into shp and it looks fine, but the scale is wrong. How might I ...
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243 views

How can I call gdal_translate from Java code?

How can I execute gdal_translate in Java? For example, will something like this work? gdal_translate "PG:host=localhost dbname='xyzy' schema=public' table='xyz'" "d:\xyx\ab.tiff"
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1answer
688 views

Uploading raster format(*.tif) to postgis through raster2pgsql

I'm new to postgis and raster file format. i currently working on netcdf files and i want to import it into postgis through curl command line tool but its failed for me.so i jump on to GDAL v1.9.2 ...
3
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1answer
1k views

GDAL bindings problem with ArcMap 10.1 Python tool

I'm really getting mad with this. ArcGIS sometimes can be so just...irritating! Forgive me if this question is by any means duplicating this one or similar ones, but I really can't find my way out of ...
11
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1answer
495 views

Assign projection to a satellite image

Today I stumbled upon a picture taken from the ISS looking down Europe and it is really beautiful. So, I started thinking I could add more to the picture. Like world borders, cities, road network, ...
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1answer
293 views

Is it possible to use GDAL to combine (rather than mosaic) rasters

Is there a GDAL command which can combine multiple rasters so that a unique output value is assigned to each unique combination of input values, like the combine command in ArcGIS? gdal_merge seems ...
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3answers
675 views

How to test if geometry is inside another?

I need to tell whether geometries from a shapefile are inside other geometries or not. For example, I want to test if there are trees (represented as points in trees.shp) inside the urban areas (...
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1answer
499 views

Local variance image in python using gdal and a running window approach

I want a local variance image with a 3x3 of a geospatial raster image using python. My approach so far was to read in the raster band as an array, then using matrix notation to run a moving window and ...
6
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1answer
5k views

convert from HDF to GeoTiff

I am having some problems with the conversion from HDF to GeoTiff. I am following the steps described in this webpage. The problem is that I can't find what is the NDVI subdataset name (XXXX) in ...
15
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1answer
2k views

How to rename field names in a shapefile from the commandline?

I need to rename the field names (attributes) in a shapefile. Is there an easy way to do this from the command line?
6
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1answer
8k views

Python GDAL: Save array as raster with projection from other file

I have an array of data, and for each datapoint I know the latitude and longitude. I'd like to save it as a GTiff with the same projection as other rasters I have. This is what I've tried so far, but ...
3
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1answer
451 views

OGR - Weird GeomType -2147483645 on polygon shapefile

I am trying to import a shapefile (multipolygon) in an app with ogr but I got an error about invalid geom type. If I inspect the data with ogr like this: datasource = ogr.Open("c:\\temp\\data.shp") ...
3
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1answer
864 views

Export KML ExtendedData with OGR2OGR

I would like to export with ogr2ogr the data I have in a kml as ExtendedData <Placemark> <ExtendedData> <SchemaData schemaUrl="#15540_punti"> ...
0
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1answer
759 views

OGR OSM-driver unable to open datasource

I want to read an OSM file with OGR. I use Version GDAL 1.9.1, released 2012/05/15. To read a SQLITE file works fine: $ ogrinfo test.sqlite INFO: Open of `test.sqlite' using driver `SQLite' ...
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4answers
1k views

Get vector features inside a specific extent

The problem: I have a very large vector layer with many features and a much smaller raster layer in a defined region. I want to get only those vector features which are within the raster layers ...
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2answers
1k views

Why do I get different output from gdal2tiles vs. maptiler?

I am trying to generate map tiles using gdal2tiles for an area much larger than MapTiler can handle. However, my tile caches are not showing up on the maps. I checked gdal2tiles by running the same ...
11
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2answers
5k views

How to get raster corner coordinates using Python GDAL bindings?

Is there a way to get the corner coordinates (in degrees lat/long) from a raster file using gdal's Python bindings? A few searches online have convinced me that there is not, so I have developed a ...
2
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0answers
221 views

efficiently slicing tiles with gdal C API

Im working a project using the gdal C api(in a block of objective-c) to slice TMS style png tiles. The code currently works, but I'm running into some trouble optimizing to run fast enough for use on ...
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312 views

using GDAL/OGR (faster)

Eventually, I was able to get the GDAL installed and compiled correctly using Visual C++ 2010. I even tested some of its methods on some geo-referenced raster files, and it looks like that all is ...
2
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1answer
208 views

gdal_retile.py tile naming scheme

Is there a way to define custom tile names during a gdal_retile.py process, other than the default _01_01. For instance, suppose I want to start naming my tiles at 100_100, is this possible?
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1answer
192 views

How to save image to disk with with gdal_translate?

I do: import os from gdal import * filename = 'c:/rast.jpg' outputTif = 'c:/rastOut.tif' os.system('gdal_translate filename outputTif') but it returns "1". gdal_translate doesn't save the image ...
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1answer
143 views

gdal_retile.py and gdal_translate Requirements

I basically need to use two GDAL utilities: gdal_retile.py and gdal_translate, on a Solaris 9 machine. I have tried compiling GDAL from sources, but this seems not to be working. So, since I have ...