An image mosaicing, reprojection and warping utility

learn more… | top users | synonyms

1
vote
1answer
97 views

gdalwarp '-tps' equilvalent in C# wrapper?

I am attempting to do the following from code: gdal_translate.exe --config GDAL_DATA "D:\gdal\bin\gdal-data" -of GTiff -a_srs EPSG:4326 -gcp 0 0 -108.724530873811 40.1376029956585 ...
3
votes
1answer
103 views

Generating a GDAL script through the QGIS Georeferencer

For several months, I have been georeferencing files manually using the Georeferencer plugin within QGIS. I am now attempting to automate this process using GDAL. The Georeferencer provides a ...
1
vote
1answer
42 views

Transforming Robinson to Equirectangular

I need convert this http://bioval.jrc.ec.europa.eu/products/gam/images/large/access-map.png (is it robinson?) to Equirectangular (ESPG:32662) How can i get this using gdalwarp?
2
votes
1answer
292 views

Georeferencing a raster using GDAL and Python

I want to georeference a raster using python and GDAL. My current approach is to call gdal_translate and gdalwarp using os.system and an ugly list of ground control points. I'd really like a way to do ...
2
votes
1answer
44 views

warping and outputting coordinates of GeoTiff data: advice and error checking

So I have a massive TIF file (projected in Lambert azimuthal equal-area), and I'm trying to get lat/lon coordinates for each point of the grid. My first step is to warp the projection to the WGS84 ...
3
votes
1answer
229 views

Bug in gdalwarp's simple nearest neighbor? Or more likely I need some help

I'm trying to understand how to use the GDAL utilities a little better. I think I've defined something incorrectly or I've found a bug in gdalwarp. My bet is that I've defined something incorrectly, ...
3
votes
2answers
112 views

gdalwarp leaves horizontal artifacts regridding from EASE-Grid (laea) to Polarstero (stere)

I'm trying to understand how to use gdalwarp to warp an image. I believe I'm doing the basics correctly, but I might be missing some gdalwarp options? Any help would be greatly appreciated. The ...
1
vote
0answers
53 views

GDALwarp Creates Darker target Image sometimes

I'm yoyo and new to this forum. I'm relatively new to GIS and GDAL. Please accept some typos now and then... English is not my native language. Because of some problems with GDAL 1.7.0b2 in FWTools ...
1
vote
0answers
64 views

How to run cmd prompt in the background and show progress bar

I am warping files using gdal. Since I have numerous files to warp how will I run the cmd in background and just have a progress bar to indicate the percentage in warping the files? Because when I ...
1
vote
1answer
71 views

Geographic -> UTM Raster Rectification

I'm trying to use an image overlay in KML / Google Earth as the basis for adding extra info and returning this to Google Earth. In my utility app I can specify a rectangle to give me the ...
0
votes
0answers
35 views

GDAL_Translate not compressing when NoData value is set

I am trying to compress a .TIF file using GDAL_Translate or GDAL_Warp. My Raster is 32mb to start with. When I use GDAL_Translate with the COMPRESS=PACKBITS option, it compresses to 1.9mb. However ...
1
vote
1answer
106 views

How can I clip multiple geotiff tiles with a shapefile without greatly increasing their size?

I'm using gdalwarp to clip a number of geotiffs (tiles of a larger map) to a polygon described by a shapefile (which is about the size of the overall map, i.e. much larger than individual tiles) ...
1
vote
2answers
186 views

Using very large image formats with GDAL

I would like to use gdalwarp and gdal_translate with some very large raster images (313,040 x 313,040 px) and I'm wondering what the best format or method is to do this, if it's even possible. I have ...
1
vote
1answer
140 views

Using gdalwarp with multiple elevation models

I'm trying to use gdal_warp to slice and convert some SRTM data. The data I'm interested in are in S30E152.hgt and S30E153.hgt. What I'd like to do is: Convert these DEM files from EPSG:4326 to ...
1
vote
0answers
57 views

Mapping from one plane on the other plane despite of masking regions

have a set of data given here, where in the first and second columns there are the sky coordinates (ra,dec) e.g. right ascension and declination, respectively and in the third and forth, the ...
1
vote
1answer
105 views

Need assistance setting center coordinate with GDALWARP

I'm having some issues converting my project into an MBTiles format. I'm trying to use gdalwarp to convert my main file to geotiff format, but I can't seem to get the center coordinate to how it is ...
2
votes
1answer
526 views

How to correctly resize raster GIS images to a given px width?

I work on ETOPO1, a 466MB file, and want to move to SRTM (~20GB Earth). My workflow involve several time-consuming processing steps so I strongly want to work on a minimum raster. It usually want to ...
0
votes
0answers
54 views

Issues at reprojecting coordinates using gdalwarp and OpenLayers

I have an interpolated raster image with EPSG:27700 (British National Grid), after I warp it using gdalwarp into EPSG:3857 (WGS84 Web Mercator (Auxiliary Sphere)): gdalwarp -s_srs EPSG:27700 -t_srs ...
2
votes
2answers
181 views

Reprojecting Natural Earth raster into natearth projection with gdalwarp causing black squares?

I'm trying to reproject the Natural Earth 2 raster layer (http://www.naturalearthdata.com/downloads/10m-raster-data/10m-natural-earth-2/) into the natural earth projection ...
0
votes
2answers
27 views

data range changes when warping

When the source band having pixel values in the range of 52 and 207 is warped using the following command: gdal_warp -t_srs wgs84 -r near in_file out_file The resulted band has the pixel values in ...
2
votes
1answer
479 views

How to re-project the EASE (Equal Area Scalable Earth) grid with a ~25 km cylindrical projection to WGS84 0.25 degree?

I have nc files ,here is one file https://echange-fichiers.inra.fr/get?k=LUfqiyO1Dl7az5bihnS. from the metadata ,the projection is cylindrical and the resolution is 25 km: ...
2
votes
3answers
378 views

Use GDAL command line to copy projections

I have two images, a georeferenced Tiff and a second Tiff without a reference. The second image is a copy of the first, but it lost its reference. Now, I want to copy the reference from the first Tiff ...
2
votes
1answer
51 views

Invert gdalwrap cutline

I have a big raster image with medium details, but for some regions I do have far more details as a seperate raster image. Now I'd like to display both of them in my map that I render with Tilemill. ...
3
votes
1answer
136 views

Holes between imagery tiles projected using gdalwarp

I am having the following issue when reprojecting imagery tiles using gdalwarp. These are 4096x4096 imagery tiles, which I'm gdalwarp'ing from WGS84 to a State Plane projection. When reprojected, ...
0
votes
0answers
30 views

Misalignement of the Corine data set after reprojection with gdalwarp, nodata not working either

I want to reproject the original corine data set with a resolution of 100x100m. I am using gdalwarp: $ gdalwarp -overwrite -s_srs EPSG:3035 -t_srs EPSG:32632 -tr 100 100 -tap -wo "SAMPLE_GRID=YES" ...
2
votes
2answers
79 views

Cropping with GDALWarp in QGIS

I followed this post, the first answer, to clip a USGS Quad in order to remove the borders so that I can tile them. Basically it utilized the lat/long at the corners in a .txt file to import a ...
1
vote
0answers
69 views

GDAL Color distortion around nodata value stitching

I am trying to extract JPEGs from SID images using GDAL. I ran into a an issue where black lines were present and figured out that it was a nodata issue, so I added -src/dst/vrt nodata arguments and ...
2
votes
0answers
69 views

How to preserve GCP's after gdalwarp

I'm trying to figure out how I can preserve my GCP's after a gdalwarp. I need the georeferenced GCP's data, so I can calculate the Root Mean Squared Error. Is there a way to preserve this data, and ...
2
votes
1answer
157 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 ...
2
votes
1answer
175 views

File size inflation normal with gdalwarp?

After using gdalwarp to project and align-to-grid (via -tap) a number of rasters I noticed that the output rasters were significantly larger than the original rasters. A fairly thorough web search ...
0
votes
0answers
180 views

Importing multiple GeoTiffs in TileMill

I am a software engineer that is very new in the geo world. So excuse my ignorance if this question seems simple or if terms I use are totally wrong. Problem: I have been tasked with taking multiple ...
1
vote
1answer
113 views

How do I set nodata with custom color for gdal_translate and gdal2tilespy?

I start with a bunch of 1-bit geotiff files that I had to convert to 8-bit RGB tiff files to use with GDAL. Then I tried to set borders to red (content is in black and white so I can't use those) and ...
1
vote
1answer
74 views

Can I dewarp an image using GDAL?

I have a GeoTiff image mymap.tif https://www.dropbox.com/s/51chrzv9vp9olg8/mymap.tif $ gdalinfo mymap.tif Driver: GTiff/GeoTIFF Files: mymap.tif Size is 1085, 281 Coordinate System is: GEOGCS["WGS ...
0
votes
1answer
125 views

gdalwarp increase resolution

I currently have a 87Mb Compressed GeoTiff with a resolution of 50m. I need to interpolate this to 2.5m I have used gdalwarp to achieve this using a cubicspline, but it took 12hrs and resulted in a ...
2
votes
1answer
592 views

Cutting image using gdalwarp to extent of data

I am currently generating a raster from point data and applying inverse distance algorithm. This image is then cut with : gdalwarp -cutline <<src shape file>> -crop_to_cutline -srcnodata ...
3
votes
1answer
877 views

Re-project raster image from Mercator to Equirectangular

I have a raster image of the world map in Mercator projection, square 1:1 format. I want transform the image into an Equirectangular projection accurately. I assumed from my research that GDAL would ...
0
votes
1answer
347 views

Error with Gdal 1.10 install on Ubuntu 13.10

I've installed GDAL 1.9 then upgrade to 1.10 on Ubuntu 13.10 and then now it's error (gdalwarp can work but gdal_translate is fail) gdal_translate ERROR 1: gdal_translate was compiled against GDAL ...
0
votes
1answer
78 views

gdalwarp from within python script misbehaving

I'm trying to run gdalwarp from within a python script start = "gdalwarp -overwrite -ts 22 20 -r average -srcnodata 99 " input_file = filename[12:] output_file = "temp1.tif" print ...
0
votes
1answer
50 views

gdalwarp needs bounding box

I try to mask a raster with gdalwarp and I always get the answer: cannot compute bounding box of cutline. what is wrong with my cutline shapefile? or what requirements should it have to work?
0
votes
0answers
134 views

I had an error in Gdalwarp and i don't know the reason

I was trying to warp a raster using a mask and shift it before clipping but when i exectute the command bellow in Qgis/PyQt using QProcess: gdalwarp -s_srs "+proj=merc +a=6378137 +b=6356752 ...
4
votes
3answers
1k views

Should I use gdal_retile.py or gdal2tiles.py?

I have many GeoTif files that I want to display in google earth with Geoserver. I am wondering if I want to use gdal_retile.py or gdal2tiles.py to create the image pyramids for them to be usable in ...
0
votes
1answer
155 views

Threejs “Failed to generate a dem file using gdalwarp. gdalwarp is not installed.”

I am trying to test out the new threejs plugin for QGis and have come across this error. Failed to generate a dem file using gdalwarp. gdalwarp is not installed. I have installed the latest ...
1
vote
0answers
32 views

Problem defining the tiling starting point

We are tiling a image datasets. However, we want to specifically define custom windows. To do this, we are using -te option during warping. The warped output is then tiled. The problem though is that ...
0
votes
3answers
476 views

Leaflet.js displaying incomplete base map

I am working on a tile server with a leaflet.js UI. I have successfully created the tiles for my base map and the tiles for the overlay. The result can be seen here (zoom in further to see overlay). ...
2
votes
1answer
54 views

does Pseudo Mercator Projection causes problem while clipping rasters

I tryed to clip a Raster file using an ESRI shapefile using gdalwarp command, but i always get an empty output file or a wrong clip with wrong location. this the command bellow: gdalwarp -dstnodata ...
1
vote
2answers
1k views

Cropping Geotiff with gdalwarp

I downloaded a geotiff from the recently published 25m-DEM of the European Union (see: http://courses.neteler.org/eu-dem-new-digital-surface-model-at-25m/). One tile has about 5GB so I would like to ...
1
vote
2answers
427 views

how to georeference my png using gdal

Hello I have created my own fantasy map, I have the map in a full size png and the map broken down into tiles ( with no geo data ) I installed MS4W and tried to use it to get the georeference data ...
1
vote
1answer
403 views

How to do geometric correction of remote sensing data in R?

My challenge is to replace most of the remote sensing commercial tools with R code (I'm teaching assistant at the University and I would like to move to open source R code to show the added values to ...
1
vote
1answer
243 views

GDAL tiling with a lot of MrSID files

I'm trying to generate tiles for a region with a surface of 85k km2. The data source are MrSID files (2734 files). I'm using gdal to achieve this task. It works fine with a small subset of MrSID, but ...
2
votes
2answers
611 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 ...