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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GDAL, Georeferencing

I have been trying to use GDAL library to add geoinformation to an image. From the documentation from GDAL web page I could find that I could use GDAlSetGeotransform(), for that I need a six ...
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35 views

Reprojecting from Lambert Conformal Conic into EPSG:3857?

I'm trying to reproject a plain png image file into EPSG:3857 for use in an OpenLayers application. I'm pulling the image from the NWS site at: ...
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20 views

Gdal2tiles issue when using -z for specifying zoom lvls in raster profile

Everything works fine when not using -z. But using -z and only wanting 0-1, i run into an issue that is best illustrated as below. C:\python\WinPython-64bit-2.7.6.4-gdal\python-2.7.6.amd64>python ...
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50 views

How to import ERDAS ECW in QGIS 2.6 using GDAL 1.11?

I am using Lubuntu 14.10, QGIS 2.6, and Ubuntu GIS(unstable). QGIS was used to use GDAL 1.10, and can import ERDAS ecw format. But after GDAL upgraded to 1.11, QGIS couldn't import ecw images. How to ...
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20 views

Subtract parts of polygon that overlap with ocean

I have some seismic data in format of shapefiles/geojson. The data has no relevance in the oceans so I am looking to strip away those parts of the polygon. What I am currently doing is using the ...
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40 views

apply gdal to calculate raster that is already in qgis raster calculator

I am using the following code in qgis to calculate some raster.It is not giving the correct result as it is in arcpy.I want to apply same in gdal.Can anyone help me how to use the gdal api.Please give ...
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19 views

Using GDAL with a line layer and points layer, find next point along line layer

With the points layer and line layer, I'm trying to create a graph for path finding. I've got a line layer that I've dissolved, thinking that might make this easier. The points in the points layer lie ...
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41 views

How to read Sentinel-1 tiff images from ESA scihub with Python (and GDAL)?

I can read georeferenced tif images of Sentinel-1 downloaded from PolarView with Python / GDAL but I cannot read the SAFE format from ESA. I need it because PolarView (very nice web interface) keeps ...
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25 views

ERROR 6: The PNG driver does not support update access to existing datasets

I was trying to overlay a shapefile to some raster images from a directory using gdal_rasterize. But then encountered this error ERROR 6: The PNG driver does not support update access to existing ...
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41 views

Can't import libraries to rsaga

I get this error when I'm trying to import a raster to RSAGA: > rsaga.import.gdal(paste(rast_name, ".tif", sep=""),"RASTER", env= my_env) Module 'GDAL: Import Raster' not found in SAGA library ...
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35 views

writeOGR alters MultiPolygon holes

I'having trouble using writeOGR to write GeoJSON files, when there are MultiPolygon objects. Here is an example: I'm creating a SpatialPolygonsDataFrame object from GeoJSON, with a single feature made ...
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41 views

Create tiles for on Google Maps from PNG images

I have some PNG images in 2048, 4096, 8192 and 16384 pixel size to generate tiles for zoom level 3,4,5 and 6. My data are plotted in Mercator projection and centered over a particular area of clat ...
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61 views

gdal ReadAsArray returning NoneType

I'm trying to read in several rasters as array using gdal in a python script, but I keep getting NoneType returned and can't figure out why. The process is this: 1. Use gdalbuildvrt ...
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32 views

java gdal.jar version 1.10.1 and osmconf.ini question

Does anyone have any info on how to configure this osmconf.ini text file? I use the gdal.jar (version 1.10.1) to open an .osm (xml) (ex. ogr.Open(filename, false)). I could get the 5 Layer objects ...
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19 views

Can I export overview with gdal?

How can I export overview for example 1/4 from the orginal raster map to a geotiff file using gdal?
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Downsample raster average map with control on the average algorithm

I need to downsample raster average map with control on the average algorithm to 1/4 from original size
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38 views

ogr2ogr in java gdal

I would like to code ogr2ogr -f "GeoJSON" destination.geojson source.geojson -s_srs EPSG:3068 -t_srs EPSG:4326 in java-gdal. I tried to understand how it should work by looking at this example but ...
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33 views

OSGEO/GDAL and Rotated Pole Grids

I have a netCDF containing a raster in a rotated pole grid. I have a script for converting the desired information to GeoTiff, however it requires projection information in the form of WKT string. ...
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248 views

SSL certificate problem: unable to get local issuer certificate with gdal and curl

* Connected to ascendxyzdatastagingweu.blob.core.windows.net (168.61.57.78) port 443 (#0) * libcurl is now using a weak random seed! * SSL certificate problem: unable to get local issuer certificate * ...
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219 views

help with TMS (gdal2tiles) Openlayers 3 and custom projection

I work with a local italian projection (EPSG:3003 Monte Mario Italy zone 1) and I had loaded this projection in my project for evitate to reproject all of my data. I had created the tile pyramid with ...
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81 views

How to Read GDB from c#

I am trying to read .gdb file using osgeo api i go for following code but cant read. suggest me. string File= @"D:\GDB File\Demo.gdb"; public IConnection OpenFDOSourceConnection(string File) ...
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92 views

Offset problem with GeoTIFF and Google Maps

I have several GeoTIFFs generated with GDAL, and just some of them present a weird offset shift of a range of ~5 km in average. The range of these problematic rasters is as much as -85/-70/-20/0. ...
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27 views

GOES 13 EAST How to Georeferencing

I have a many image for Georeferencing, Goes 13 EAST this is metadata: GOES 13 Imager frame 78 at UTC 14:45:22.485 day 009 of 2015 Vis pixels : 4009, 24840 lines : 2621, 13440 Vis Lon : ...
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48 views

Mosaic several geotiff files

how to mosaic several geotiff file to submap that does not contain ALL the source maps I need GDAL C++ API?
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26 views

increase gdal_polygonize's capacity

I have a very big PNG (82500x40900) with more than 5000 polygons. I want to use gdal_polygonize but the geojson output shows that gdal_polygonizer stopped after 4770 polygons and the geojson isn't ...
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201 views

How to fix “Unable to load GdalTools plugin. The required ”osgeo [python-gdal]“ module is missing.”

When I start QGIS, it display error message: Unable to load GdalTools plugin. The required "osgeo [python-gdal]" module is missing. Install it and try again. Couldn't load plugin 'processing' from ...
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71 views

Set coordinate origin to the top left corner

I have a BMP-picture and I know that it's top left corner has the EPSG:3068 coordinates 35500,24390. I would like to use gdal_polygonize and than calculate the EPSG:3068 coordinates of the produced ...
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51 views

Linear interpolation on raster data, save result (geoserver)

I am trying to perform a linear interpolation on a coverage layer (Source data is in EHdr Coverage format, file extension: .flt). Ultimately, I want to use the interpolated layer as input to a WPS ...
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35 views

Problem with Leaflet Boundary Canvas plugin

I'm trying to identify the source of a problem that I'm having, I cannot show a tile layer(created with gdal2tiles) inside a polygon generated in Leaflet, using the plug-in ...
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159 views

Description of parameters of GDAL SetGeoTransform

Can anyone help me with parameters for SetGeoTransform? I'm creating raster layers with GDAL, but I can't find description of 3rd and 5th parameter for SetGeoTransform. It should be definition of x ...
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49 views

How to create a 8Bit unsigned geotiff with gdal?

I'm trying to create a 8 bit geotiff with this code. Is there a way to use unsigned 8 bit? I only found the GDT_UInt16? import numpy as np from osgeo import ogr, osr, gdal from osgeo.gdalconst ...
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28 views

Projection of COSMO-EU?

I have data points of COSMO-EU data stored in WGS84 coordinates. Now I try to transform them into coordinate system where the points becomming arranged to a regular grid. Does anybody knows the Proj4- ...
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64 views

GDAL virtual file system, how to create your own

I just found a blob post about, GDAL virtual file system, and I was wondering if I could create my own and how to do so? I want to create a virtual file system for reading directly from blob storage. ...
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22 views

Change “World Size” with gdal2tiles.py

When I use the flag "-p 'geodetic'", the output is a world that is 512x256px at zoom level 0. In order for it to overlay with other datasets, I need it to be 640x320px at zoom level 0. I am looking ...
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62 views

GeoTiff using GDAL

How can I project a tiff using the position of the four corners where the picture have to be placed ? The tiff file has no georeference or projection information I have got a grid with values of ...
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141 views

Google Tracks convert kml to shape and preserve attributes

I've been attempting to convert a Google Tracks kmz file to an ESRI shapefile using the GDAL and libkml(http://www.gdal.org/drv_libkml.html) which I built on my Ubuntu 14.04 (64-bit) system. The kml ...
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22 views

Script Efficiency

I have been working on a script to read pixel values and print the values out to a text file. This is currently working but takes around two hours with a 6.6gb file. This is to replace an older script ...
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78 views

PALSAR 50m Orthorectified K & C Mosaic it's possible to create interferometry?

JAXA is providing free access to PALSAR 50m Orthorectified K & C Mosaic. According to the website, data are provided in raw (HDR) and png. ALOS PALSAR K&C Mosaic or New global 50m-resolution ...
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43 views

Ignore empty tiles in gdal2tiles.py when generating tiles

I am in the process of generating a large set of tiles from a .vrt file composed of many images. The image is following a road section, being very long and small strip of images and due the shape of ...
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45 views

gdalbuildvrt not working with star in path on windows

In my directory C:\dev\Jpeg-geo\del1 I have a set of .jpg and .jgw files that I am trying to put together with gdalbuildvrt but its giving me a weird error. ...
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30 views

Adding a column to several feature classes in a file gdb using ogr2ogr

I'm trying to add the same column to 25 feature classes in an ESRI FileGDB. I managed to do this for one feature class by using ogr2ogr: ogrinfo C:\temp\test.gdb -sql "ALTER TABLE table01 ADD COLUMN ...
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44 views

georeference a grid by using a script

I've got an image and a set of coordinates, which represent a grid, that looks similar to this: What I'm looking for is a script, that would transform my image, by using such a grid. Edit: My ...
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54 views

Precision loss when transforming coordinates systems in GDAL (vector layers)

Anybody knows the order of magnitude of the error introduced when transforming coordinates using GDAL? More specifically, I would like to know if significant error is introduced when the ...
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44 views

Dxf to Shp - Coordinates wrong

I've converted a dxf file to a shape file using the folowing ogr2ogr command: ogr2ogr -s_srs EPSG:31464 -where "LAYER='0'" -f "ESRI Shapefile" dgm.shp DGM1.dxf Or ogr2ogr -where "LAYER='0'" -f ...
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35 views

Confuse about how to make a tiles to support retina device

I have a map picture(15772*13796) so I break them to tiles using gdal2tiles(512*512px not 256*265px) for support retina device but is this correct? Because I a had read this issue and this. They ...
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128 views

Merge/mosaic categorical rasters in QGIS/GDAL

I am attempting to make yearly bins of some monthly MODIS data for all of the US. The cells of the raster are defined with Julian dates indicating the date at which a burn event took place. After ...
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60 views

Read esri shape point data and spline interpolation using python shell scripts?

I am quite new in python scripting. I am a dedicated user of arcgis but this time I have to work without arcgis. I have a point shapefile with 10 different attribute fields of different peat layer ...
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89 views

Read large raster into lat/lon value pair to csv file using python and/or gdal?

I have rasters for all of the states in US and they are in 10m resolution. So they can be very large, containing a large number of pixels if you think of TX or AK. I want to create a csv file with ...
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92 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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36 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 ...