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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Creating tiling scheme to get multiple extents before gridding elevation data

Looking to create 1 degree by 1 degree tiles with pixel overlap to get extents before I start gridding. So basically I would like to have a shapefile of the tiling scheme with extents before having ...
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39 views

Generating continuous aspect surfaces from DEM with QGIS

I'm trying to extract aspect surfaces from different DEM sources at different resolutions in QGIS. I've had success working with SRTM-derived grids (3-arcseconds) and am trying to perform the same ...
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22 views

Access MEM data from GDAL?

I don't have any answers (yet) from from previous question on GDAL memory raster + OpenLayers, so i'll try to ask an easier question :) Anyone knows how to access GDAL memory with command lines when ...
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88 views

Write stacks of GeoTIFF image to NetCDF by chunk size

I converted GeoTIFF image stacks to NetCDF file with writing data by Index order (layer by layer) (this was a main solution). The problem is, it writes slowly (for 25 images - 1Gb takes 90 seconds). ...
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Retaining resolution of MODIS data while reprojecting using gdalwarp

Can anyone help me to use gdal(gdalwarp specifically) for reprojection? I am using it to reproject MODIS data : I originally have an hdf file - MCD43A4.A2005001.h08v05.005.2007351192333.hdf which has ...
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19 views

Check if raster (part of) lies within a pixel - python/gdal

I have a list of the corner-coordinates of different grid (c1-c4). First i sorted these coordinates to ensure that c1 is the upper left, c2 is the upper right, c3 is the lower left and c4 is the lower ...
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34 views

getting started designing satellite projection raster

How do I get started designing a map with a satellite projection like this:http://bl.ocks.org/joyrexus/6619251. So far using d3 I've created a map of North Africa w/ topojson and tiles from Mapbox but ...
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37 views

ReadAsArray leaves Qgs in unstable state

I have a QGIS plugin that reads a raster to get the elevation at vertex points in a polyline. The issue is that even though a single call to ReadAsArray(...) appears to work, if I immediately exit ...
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37 views

CF convention and GDAL projection

I'm trying to create some NETCDF4 CF compliant files from some code that generates GDAL compatible files. I was wondering whether there is a simple translation from GDAL (or proj4) projection ...
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48 views

How to add Geo PDF header to a PDF rendered with mapnik?

I rendered a PDF with mapnik and I am now trying to add geospatial header information to the PDF. I tried the method add_geospatial_pdf_header() from mapnik.printing.PDFPrinter. I do get some Geo PDF ...
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127 views

Error in opening Raster dataset in qgis “Cannot open GDAL Dataset”

Error in opening Raster dataset in qgis (see image below). Is there any suggestion as to why this is happening? and how do i correct it?
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Changing pixel values of GDAL VRT

Is it possible to manipulate the pixel values of a GDAL VRT and, if so, how? The original data must remain unchanged. I have a dataset which might be a bit rotated so that there are no data values on ...
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62 views

Upper limit to number of GeoTiff tiles?

I'm using the GDAL SWIG python bindings to create a new GeoTiff raster for use in a blockwise exponential-decay function. kernel_size = 177764054 driver = gdal.GetDriverByName('GTiff') kernel_dataset ...
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84 views

gdalwarp UTM Zone 1 to WGS84 - fails to transform

I have a global dataset consisting of tiles in UTM projection that I want to mosaic and therefore need to reproject to a common projection. Can I solve my reprojection error with options to gdalwarp ...
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49 views

Handling warning about DX and DY in gdal_translate from .Gtiff to .ASC?

When I try to convert Gtiff to .asc file, QGIS shows the warning: Producing Golden Surfer style file with DX and DY instead of CELL SIZE since the input pixels are non-square. Use the FORCE CELL SIZE ...
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28 views

Raster statistics change after re-projection — which one is correct

I'm looking into some global DEMs (like ETOPO1 - http://www.ngdc.noaa.gov/mgg/global/global.html), and noticed that the statistics for the elevation values can change quite a bit after reprojecting ...
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32 views

Theory notions on exporting bufr data in geotiff format

I'm trying to export some bufr data from polar satellites/sensors like DMSP, ASCAT, ATMS etc in geotiff image. When my program rasterizes satellite data (brigthness temperature for example) by ...
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56 views

WMS layer throws “IReadBlock failed at X offset 0, Y offset 1” error. Possible XML issues

I am working with a few WMS layers to try and see which one would work best with an application I'm developing out of QGIS 2.8. I need the CRS to be in EPSG 4326 but, as many of you know, most webmaps ...
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22 views

Should I set the projection if the data has already been projected?

I need to plot some data which was produced on a native grid with a lambert conformal conic projection. I need to create a geotiff (using python and gdal) and was wondering how to go about and do ...
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141 views

how to set the geotransform using GDAL in python

I am trying to create an image from a numpy array and georefenrece it so that I can import it into qgis. I have the latitude and longitude in degrees for the top left corner of the array as well as ...
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31 views

Projected Coordinate System issue using GDAL and qgis when defining x and y

I have a numpy array which I would like to save as GeoTiff using GDAL in python. The array was created using the following PCS in mind: +proj=lcc +lat_1=48 +lat_2=48 +lat_0=48 +lon_0=0 +x_0=0 ...
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111 views

How to handle GDAL dataset error when accessing Arcgis Online world imagery data?

I would like to use the world imagery data set for loading base maps to my QGIS projects. Up until now, I have had no problem by typing the following command in the Python console: ...
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57 views

GDAL MSSQL with numeric table names

I have many SHP tables organised by year, for example 2015_xx_data.shp that I have loaded into a MS SQL Server database using OGR2OGR. I have also loaded them into MySQL for a comparison. There are no ...
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127 views

How to import netcdf in qgis

I have been trying to impot netcdf files following this guide online http://www.ggiuliani.ch/download/netcdf_qgis_GG.pdf into qgis 2.10 with no success. ALthough the file is imported, the dimensions ...
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479 views

Error While installing GDAL in Ubuntu 12.04

I am trying to set CartoDB in Ubuntu 12.04. I am trying to install Python dependencies as a part of my installation. I am installing with below commands export CPLUS_INCLUDE_PATH=/usr/include/gdal ...
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69 views

GDAL - replacing rgb value (0,0,0) with (nodata,nodata,nodata)

I have a set of rasters in which I want to replace any rgb value of (0,0,0) with (nodata,nodata,nodata) I've tried using gdal_translate -a_nodata "0,0,0" in.tif out.tif But this seems to convert ...
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23 views

Transform stereographic projection using GDAL

How can I read/wrap a JPG image without any embedded projection/coordinate system to an autoreferenced GEOTIFF with Mercator or similar coordinate system using GDAL? The image is 500x500 px and I ...
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40 views

How to use ST_fromGDALRaster correctly with a given GeoTIFF

I am trying to import gdal raster data (a GeoTIFF) to a Postgis database, using the ST_FromGDALRaster method (http://postgis.net/docs/manual-2.1/RT_ST_FromGDALRaster.html). The question is that I ...
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30 views

Changes in MOD09A1 quality mask as processed with GDAL

I'm analyzing MOD09A1 spectral data using GDAL/Python. The quality mask is a uint32 dataset and want to pull out the value of the first bit to mask the spectral data (1 == poor data; 0 == good data). ...
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685 views

Reading, modifying and writing a geotiff with GDAL in python

I'm trying the learn the ropes of Remote Sensing image processing using Python GDAL bindings and numpy. As a first attempt, I'm reading a Landsat8 geotiff file, do a simple manipulation and write the ...
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91 views

how to reproject an image programatically in c# using gdal

I have to reproject an image programmatically in c# using gdal library. For the moment i'm a little bit lost in gdal and i don't really now which methods i have to use. I think i will have to ...
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24 views

gdal: Pixelvalues to nodata

I have a GRD-File where all pixelvalues which are less than 0.05 should be converted to nodata. I know how to do this with ArcMap, but the process should be done automatically, for example with ...
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159 views

What if 'geometry_columns' already exists in MSSQL Server Database?

When trying to load a .SHP into MSSQLSpatial using OGR2OGR, I get the following error: ERROR 1: Error initializing the metadata tables : [Microsoft][ODBC SQL Server Dr iver][SQL Server]There is ...
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46 views

gdal2tiles issues with color scale between tiles

Background: I have a series of about 40 small GeoTIFFs that need to be merged together to make one large image. Each GeoTIFF has 2000 bands. I've tried using both gdal_merge and gdal_retile to pull ...
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74 views

gdallocationinfo used in javascript with node-gdal?

I've been scratching my head for a white trying to figure it out if it's possible to get pixel information from my rasters using gdallocationinfo in javascript. I found node-gdal, but after reading ...
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100 views

WKID issue when adding raster layer from ArcGIS “mapserver” to QGIS via REST

QGIS docs here describe how to do this. I am trying to add a layer from this MapServer: gps.digimap.gg/arcgis/rest/services/JerseyBaseMap/MapServer When I try the following command from the Python ...
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116 views

32Bit QGIS 2.10 Problems with Gdal WMS TMS google maps layer

I have been using gdal wms layers to view various basemaps in QGIS. I am using this technique rather than open layers because this I can reproject gdal WMS layers as needed. When I get close to the ...
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31 views

How to Divide geo spatial Raster images into tiles and combine back into a complete image

I am reading a 2048 x 2048 image in the form of (204 x204) tiles and bilinear interpolating them to get (819x819) tiles. Then combining several 819x819 tiles to form a 8190x8190 image. Now as you can ...
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34 views

Python crashes when I try to import GDAL after re-installing it

A while back I went through the installation process for GDAL by installing the core components and then the Python/GDAL bindings. Everything was fine when I would type in from osgeo import gdal. ...
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76 views

Serving GeoTIFFs of different resolutions as single layer

I'm trying to serve a 30 arc second DEM with global coverage combined with high resolution 1/3 arc second DEM for a very small area. I believed at first I could combine them into a single file, ...
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46 views

Non-Square Pixel on georeferencing of images using GDAL

I have a image in .jpg format. I have some GCP and also know the pixels values of these GCp in that image. Now i trying to convert this image into geotiff. for that I have coded the following lines. ...
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54 views

how can I get the rest attributes like ATTV, ATTL etc. using S57 Reader?

I'm using GDAL to read S57 files to display them with S52 styles, but I was unable to get the attributions like "ATTV", "ATTL"? Do you know how to get it? I have put the two supporting files, ...
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225 views

Trouble installing Rasterio module for python 2.7 on windows

Can anyone please explain to me in step by step instructions how to install rasterio with Python 2.7 on Windows. I have Windows 8 and have tried information on Link I have installed all the ...
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254 views

Minidump on exit in QGIS (2.8.2- Wien) 64-bit version when using GDAL in plugin

I am working on a plugin for QGIS that is working fine on 32-bit versions but I am having some problems while using it on the 64-bit standalone installation package. I have tried on several machines ...
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81 views

rasters written with gdal show up with units of meters when they should be degrees

I have some SMOS soil moisture data packaged in a netcdf format distributed by "cp34-bec". I have been able to use GDAL to extract this data as a raster layer, using a projection i think is ...
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77 views

rgdal with multiple Feature Datasets in R

I am trying to read shapefiles contained within a geodatabase file (.gdb) into R. The .gdb contains two Feature Datasets with multiple Feature Classes within each. The problem is only one of the two ...
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120 views

Is there an open source solution to access raster layers in an ESRI File-GeoDatabase?

I'm looking for a way to access raster layers in an Esri File-GeoDatabase without using ArcObjects or ArcPy, specifically I would like to access the raster layers with GDAL. I understand that the GDAL ...
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56 views

Rasterstats throwing error: Cannot open as GDAL raster

I'm using the rasterstats zonal_stats function (pip installed), and running it on a .vrt file. Everything runs perfectly in my Ipython notebook, but when I try to run it in my regular python ...
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70 views

MS Visual 2013 with GDAL and HDF 4

I'm using MS Visual Studio 2013, C++ and newest gdal downloaded from here http://www.gisinternals.com/query.html?content=filelist&file=release-1800-x64-dev.zip In readme and libraries I can see ...
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57 views

Extra white space in ASCII file due to Translate GDAL from QGIS Modeler

Could anyone enlighten me why do I get an extra white space in from of my first column in an ASCII file generated through a model? With ArcGIS it doesn't happen. Output raster type: Int32 Output ...