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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2answers
187 views

How to convert Point coordinates into CSV format?

The GDAL documentation describes how to convert a ShapeFile into CSV data. The layer create options (-lco parameter) allows to prepend the coordinates of Point features to the actual attributes ...
2
votes
1answer
182 views

How to remove strange gdaldem hillshade artifacts?

I've downloaded 9 chunks of 1 arc-second NED in IMG format from the National Map. I'm trying to create a hillshade from them. I'm using: GDAL 1.10.0, released 2013/04/24 First, I combine them and ...
2
votes
1answer
147 views

gdal2tiles.py generating black tiles from .img file

I have a source HFA Erdas Imagine (.img) file which I'm trying to convert into tiles using gdal2tiles.py. I'm running: gdal2tiles.py -w google -g GOOGLEKEY input_file.img The HTML is generated ...
2
votes
1answer
302 views

Problem with georeferencer in Qgis 2 64bit installation

I tried to use the georeferencer in the new Qgis 2 64 bits for windows. I tried with the standallone installer and with the OSgeo4w installer. The problem is when I load the raster that I want to ...
2
votes
2answers
465 views

How do I know the vertical/horizontal units of my DEM? I'm creating a slope using gdaldem

I'm using gdaldem to create a slope map. I can apply a scale. The default is 1. The notes say: Ratio of vertical units to horizontal. If horizontal unit of source DEM is degrees (e.g WGS84 ...
2
votes
1answer
526 views

Using GDAL to connect to a WFS

I'm trying to connect to a wfs using GDAL, from reading some of the (fairly sparse) documentation on this i have found that this is possible if GDAL is compiled with the correct drivers (Curl, ...
2
votes
1answer
803 views

Why does ogr2ogr SHP import error out trying to create a database?

All, Can anyone tell me what the error is with OGR2OGR when trying to import a .SHP into MSSQLSPATIAL? ERROR 1: MSSQL Spatial driver doesn't currently support database creation. Please create ...
2
votes
0answers
503 views

Use GDAL/Python to add rasters (tiff) to an ESRI File Geodatabase

I'm using GDAL python to create a bunch of tiff files from a netcdf file. def modelout_to_geotif(netcdfile, outdir, VarName): """ Given the path to the netcdf output, produces geotiffs for ...
2
votes
1answer
152 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?
2
votes
1answer
310 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") ...
2
votes
1answer
238 views

st_clip and gdal_translate: “Error browsing database for PostGIS Raster properties” - Why?

Im using shell-script, postgis2.0 and gdal for trying to clip raster apart, using an overlapping raster and a the_geom-object. At first I create a view to clip the overlapping part of the raster. It ...
2
votes
1answer
299 views

gdal.py as part of bat script in windows 7

I need to run the following bat file from a MS4W shell which has gdal_retile.py as the final option. I have added C:\ms4w\python\gdal to my pythonpath but within a pyscripter shell I can not import ...
2
votes
2answers
391 views

--optfile not working with gdal_retile?

I have the following gdal_retile command I am trying to run, but it errors on the --optfile: gdal_retile.py -v -r bilinear -levels 8 -ps 512 512 -co "tiled=YES" -targetDir pyramid --optfile files.txt ...
2
votes
3answers
1k views

Batch script converting and resampling orthophotos

I would like to convert more than 300 orthophotos produced at scale 1:8.000 with a pixel size of 0.8m X 0.8m from Ecw format to Tiff format and after resampling pixel values. My aim is to batch ...
2
votes
1answer
490 views

Finding lat/lon of corners of geotiff file

I am a GIS newbie. I just recently managed to turn a GeoTIFF file into a bmp file using gdal_translate. Now I need to find the latitude/longitude coordinates of the corners. I would prefer to use ...
2
votes
1answer
568 views

Simple band arithmetic on GDAL virtual rasters (VRT)

I want to calculate the difference of two bands. I have the individual bands stored somewhere, but I was thinking that maybe there's a way of producing a VRT file that is the result of this ...
2
votes
1answer
891 views

gdal_grid problem reading vrt file

I am trying to parse csv file and visualize it as geotiff using gdal_grid but I keep getting this error: C:\work\testgdal1>gdal_grid -ot Float32 -l test test.vrt dona.tif ERROR 1: Failed to ...
1
vote
2answers
44 views

[GDAL API]: can't save image in some formats

edited "32-bit buffer" below means that it contains 32-bit rgba pixels. I need to save image to file from 32-bit memory buffer. Code below works well for that when I use TIFF format. In this case ...
1
vote
2answers
75 views

GDAL C++ API: How to create PNG or JPEG from scratch

I'm new to GIS and GDAL. My question probably is very basic, but I couldn't find answer. May be I don't understand GDAL ideology. I need to create raster images from scratch, for example, JPEG or ...
1
vote
1answer
106 views

Changing color of raster images based on their data values - gdal

Let's say I have 1 band raster images with Gray Color Interpretation and I want to change their color based on their data values. Data values -1, will be Blue, -0.5 will be Light Blue, 0 will be ...
1
vote
2answers
216 views

gdalwarp batch process

I have downloaded numerous hdf files from an ftp site. Half of them were level 1 and the rest were level 2. Lvl1 format is Afile.A1_AC.sample.hdf and the lvl 2 format is: Afile.A1_AC.sample.hdf. How ...
1
vote
1answer
115 views

gdalwarp won't export AAIGrid

I'm trying to use gdalwarp to reproject an ascii grid file. According to http://www.gdal.org/formats_list.html this shouldn't be a problem and indeed I can happily use gdal_translate to create grd ...
1
vote
1answer
242 views

How to have PostGIS 2.1 and the Python osgeo library installed together without compiling from source?

My python application makes heavy use of the osgeo library. We're looking to upgrade from PostGIS 1.5 to PostGIS 2.1, and I'm having issues. I'm installing packages from the Ubuntu GIS PPA. Before, ...
1
vote
1answer
182 views

Unexpected output when using gdal_rasterize

Ok, I used the following code for converting my layer into raster format but I get a tif file that is completely black or white... from osgeo import gdal, ogr # Define pixel_size and NoData value ...
1
vote
1answer
174 views

syntax error when using gdal in python console QGIS

When I run the following code in the python console in QGIS I get a syntax error: import osgeo.gdal gdal_rasterize [-b 1] [-burn 255] [-a Pixelkost] [-te 170000.2 168000.27 177999.8 177999.8] ...
1
vote
1answer
259 views

GDAL - How to get gemetry type of a MapInfo TAB file?

I am using the OGR MapInfo File driver to read a MapInfo TAB file. However, the function GetGeomType() returns 0 which means 'wkbUnknown` even if the features in the TAB are only multi-polygons. Is ...
1
vote
1answer
45 views

How can I specify the ranges in the gdaldem's color configuration file?

I want to render an IMG file according to a specific renderer, and export to a jpeg File. I have asked a question about this, and got a satisfactory answer. The issue now is that I need to write a ...
1
vote
1answer
163 views

WKT for local mine grid

I have been trying to create a WKT entry to use in gdalwarp etc. I need an affine transform from coordinates in MGA94 Zone 54 to our local mine grid. All efforts have so far failed, including using ...
1
vote
2answers
571 views

OSX 10.9 + QGIS 2.0.1 - Missing osgeo module

Running the following: QGIS 2.0.1 (via Kyngchaos) OSX 10.9 GDAL/OGR 1.10.1 (via Homebrew). Recently, I've become unable to use the OpenLayers plugin, which is complaining that I'm missing the ...
1
vote
1answer
188 views

Writing array to vrt

I would like to write an array from a single band image to a 3 band vrt where each band has the ColorInterpretation() tag of red, green, blue respectively. My code below; from osgeo import gdal ...
1
vote
1answer
197 views

SetColorInterpretation() for a GeoTiff using GDAL not working

I have a single band image which I would like to copy to a 3 bands of a new image and set the ColorInterpretation to red, green and blue respectively. I have tried two approaches, one using the GTiff ...
1
vote
1answer
379 views

How to convert 4-channel PNG files to grayscale geoTIFFs?

I suspect that there exists a gdal tool (gdal_translate?) that will convert a 4-channel PNG (+ world file) to a 1-channel (gray-scale) geoTIFF. From the gdal_translate man page, it appears simple to ...
1
vote
1answer
303 views

Error Updating Gdal with Homebrew

I recently updated my version of Gdal using the homebrew package manager. However, now whenever I use gdal from within my terminal shell, I get the following error: dyld: Library not loaded: ...
1
vote
0answers
137 views

gdalwarp not clipping neatline properly

I have a PDF file (10mb) which contains a NEATLINE polygon in metadata. $ gdalinfo I5601_GeoPDF.pdf Driver: PDF/Geospatial PDF Files: I5601_GeoPDF.pdf Size is 5906, 3543 Coordinate System is: ...
1
vote
1answer
153 views

re-project from EPSG:4326 to polar projection

I have global georeferenced DEM tiff file in EPSG:4326 and want to re-project in EPSG:3411. I used this command: gdalwarp -s_srs EPSG:4326 -t_srs EPSG:3411 global.tif polar.tif which resulted in: ...
1
vote
1answer
2k views

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 ...
1
vote
0answers
247 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 ...
1
vote
1answer
503 views

GDAL: C++ API to Convert Text file of Coordinate points to Raster Pixel line?

I am using GDAL to "Grow" areas form starting seed points. I have a text file listng the coordinates of my seed locations. The X,Y coordinates are in the coordinate system of a raster image. I want ...
1
vote
1answer
400 views

how to use gdal command inside php exec() function

I need to develop a webportal which will display the images generated by a GIS software package. I my development I need to run gdal command inside php exec() function. but I don't know how to do ...
0
votes
1answer
57 views

Writing shapefile with projection defined crashes Fiona part two

I have the same problem as this post. Writing shapefile with projection defined crashes fiona It says that was an issue with GDAL. I cleaned my site-packages of anything GDAL, fiona, six related. ...
0
votes
1answer
95 views

Gdal: How to reproject from equirectangular to mercator?

I work with raster ETOPO1, made a crop of my area of interest. curl -L -C - ...
0
votes
0answers
58 views

gdal_translate from within pyqgis [duplicate]

I want to use gdal_translate from within a python script in my plugin qgis2leaf. I've tried with ...
0
votes
1answer
95 views

gdal_calc.py raster reclass equivalent of ArcGIS reclass or r.reclass in grass

Would like to achieve this in gdal_calc.Py if possible. I have a raster with a value of 0-7 in GTiff I would like one output raster where NoData = 0,1,2,3 1 = 4,5,6,7 So basically an ArcGIS ...
0
votes
1answer
300 views

How can I correct a .pgw file for a PNG image?

I have a PNG file and I need its .pgw file to be set with NAD 83 as the projection. I have created a .pgw file: 799 0 0 -799 -122.562 37.1946 However when I open the PNG in QGIS or ArcMap 10.2 it ...
0
votes
1answer
184 views

Convert a KML ImageOverlay to World Files with GDAL

I have many raster outputs from an Open Source radio transmission topographic path tool called SPLAT, georeferenced in KML image overlay format. I have figured out an easy way to use tools to ...
0
votes
1answer
125 views

gdallocationinfo is not recognized

I tried to run gdallocationinfo from my FWTools shell and got a message saying: "gdallocationinfo is not recognized as an internal or external command, operable program or batch file". So I checked ...
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votes
1answer
81 views

How can I use ogrinfo to reach information anout a .shp?

How can I use ogrinfo? where should I write it? In the visual studio's command prompt or somewhere else? Can you make some examples? when I use ogrinfo in the windows or visual studio's command ...