An image mosaicing, reprojection and warping utility

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9 views

Transform from Lambert Azimuthal “old” to ETRS89_LAEA

I'm currently struggling to convert a small raster dataset with Lambert Azimuthal "old" projection : +proj=laea +lat_0=48 +lon_0=9 +x_0=0 +y_0=0 +R=6378388 +units=m to the projection EPSG:3035 ...
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1answer
482 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. from the metadata ,the projection is cylindrical and the resolution is 25 km: indrical NC_GLOBAL#ease_resolution=25 ...
2
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1answer
277 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 ...
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1answer
32 views

Tilemill and GeoTiff not working together

Loading in a geotiff with projection of EPSG:4326 isn't fully rendering: The original: The original in Tilemill: When using gdalwarp to change the projection from EPSG:4326 to EPSG:3857, ...
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2answers
301 views

How to stop gdalwarp creating world-spanning outputs near the dateline?

I'm using gdalwarp to manipulate SRTM tiles near the the dateline (i.e. 180°, aka the antimeridian). SRTM tiles have a very slight (1/2 pixel) overlap with the meridian. You can see this using ...
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1answer
21 views

gdal_translate or gdalwarp to define projection

Which of these is the best approach to define (aka. set) a projection for a tiff? 1) gdal_translate -a_srs EPSG:32182 in.tif out.tif 2) gdalwarp -s_srs EPSG:32182 -t_srs EPSG:32182 in.tif out.tif ...
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31 views

gdalwarp `-te -5.8 41 10 51.5 -ts 1980 0` not working with mercator?

I was working with native lat/log projection on etopo1: #donwload: curl -L -C - ...
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2answers
19 views

gdalwarp changing value in nodata pixels

I'm using gdalwarp to convert MODIS NDVI mosaics from Sinusoidal to epsg:4326. To save space I'm using VRT files until I reach the final product. Here is my workflow. Mosaic NDVI Modis tiles using ...
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19 views

Cutting a shape from a VRT file with gdal warp

I have a couple of overlapping tif files which I want first to merge and then to clip a shape file from the result tif. The problem is that the tifs are pretty big and when the tiffs are overlapping ...
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1answer
60 views

jpg to geotiff transformation with gdal_translate and gcps fails

I am trying to create a geotiff from a jpeg by inputting gcps with gdal_translate: gdal_translate -of GTiff -a_srs EPSG:4326 -gcp [1616.0 0 -121.459869532 38.5822533549] -gcp [0 0 -121.460081357 ...
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1answer
69 views

Issues with getting the height from SRTM gdalwarp WGS84(EPSG:4326) to Mercator(EPSG:3857)

I am trying to use the SRTM .hgt file to obtain the height of a location. My issue is that I wish to reproject the SRTM file from WGS84 to Mercator but the height returned is not consistent after ...
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11 views

Relating to GeoLocation tool of Geospatial PDF Document

I created a PDF file with OGC_BP as GEO_ENCODING option like shown in the below command. The below tif file’s Datum and Projection details are WGS84 /Geographic (lat/lon). ./gdal_translate.exe -of ...
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19 views

What is the kernel width of the gdalwarp resampling methods?

gdalwarp provides 7 resampling methods. How many neighborhood pixels do contribute to upsampling respectively downsampling? I will try to guess. Please correct, if values are wrong: Upsampling: ...
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23 views

gdalwarp does not keep the original color-ramp

I am trying to clip a PNG file with the following command in the OSGeo4W Shell: gdalwarp -cutline coastline.shp -dstnodata "143 186 219" original.png clipped.tif This is how the original png looks ...
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1answer
30 views

GDAL - Specify span of elevation values for conversion to Terragen format?

I'm attempting to use the gdal tools to convert some geotiff files I have to the Terragen format. I was hoping to use either gdal_translate or gdalwarp in a similar fashion to this post. (though I ...
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17 views

Cropping eudem with GDAL creates zig-zag terain

I have downloaded EUDEM (20Gb) from http://www.eea.europa.eu/data-and-maps/data/eu-dem#tab-original-data When I try to crop it by GDAL using: gdalwarp -dstalpha -of EHdr -crop_to_cutline -cutline ...
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1answer
55 views

polygonize giving duplicated polygons

I am trying to reproject some ascii files and convert them into shapefiles. I am new to python but looking at some code online and help files I was able to write the following code to run on Python ...
3
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1answer
62 views

Replicating result of gdalwarp using gdal Python bindings

I am trying to re-project/resample with the GDAL python bindings, but am getting slightly different results compared to those from the command line utility gdalwarp. See update below for shorter ...
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50 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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1answer
46 views

Crop using gdalwarp aspect ratio

I'm using Landsat 8 imagery, and the Indicar Landsat Processing Tools to produce NDVI imagery from the Landsat 8 source. That works fine. I then have a bounding box expressed as lat/lon coordinates, ...
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1answer
121 views

Reprojecting a raster image using gdalwarp

I am trying to reproject an ECW Orthophoto from 25830 to 23030 srid. I tried the following but I am getting an error: C:\Program Files (x86)\FWTools2.4.7>gdalwarp -s_srs 25830 -t_srs 23030 ...
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2answers
25 views

gdalwarp: Syntax

In GDAL, I have seen the sample line: gdalwarp $(list_of_tiffs) merged.tiff I would like to merge images to create a mosaic, but can't use gdal_merge (need an exe file), e.g to merge ...
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1answer
18 views

Query shapefile for crop_to_cutline using gdalwarp

I have a shapefile with several polygons. I would like to clip a series of rasters but only use a single feature from the shapefile feature class. I am using gdal_warp. There is an option to query the ...
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2answers
78 views

GDAL - Warping raster to new domain/resolution/projection causes data loss

I am attempting to warp a GTiff from a lat/lon projection to a higher (~2x) resolution Polar Stereographic grid. In the output GTiff any cells north of 64 deg lat become NaN instead of their actual ...
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1answer
39 views

MODIS resolution missmatch between MRT and GDAL processing

I've been using MRT (Modis Reprojectin tool) to extract EVI bands into a geotiff with geographic coordinates (epsg4326). I did not specify an output resolution to MRT. The output from MRT had a ...
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1answer
87 views

Python and gdalwarp: change resolution of raster

I am new to GDAL and have been having some hard time figuring out how to change a raster's resolution and how to align it to another existing raster. I have come to the point where I have a raster ...
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1answer
63 views

convert GTiff to AAIGrid results in cell size switch

I don't have a clue why the conversion of a tif to an asc has that kind of behavior: original tif metadata Size is 466, 427 Coordinate System is: PROJCS["ETRS89_UTM_zone_32N", ... Origin = ...
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0answers
19 views

gdalwarp for warping a Space View Perspective or Orthographic tiff

i need to warp an image with a Space View Perspective or Orthographic project. What is the parameter for the gdalwarp -s_srs "+proj=???? +ellps=WGS84 +datum=WGS84" -t_srs EPSG:4258 in.tiff out.tiff ? ...
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22 views

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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2answers
367 views

Cropping and transforming geoPDF with GDALwarp

I got some great advice on how to transform a geoPDF to a geoTIF on this post, which used the available downloads from this site. I would like to take it a little further and not only convert, but ...
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1answer
211 views

Re-project from Polar projection to EPSG:4326

I simply want to project a polar stereographic raster (EPSG:3411) to Mercator (EPSG:3857) or WGS84 (EPSG:4326). The data I is from NOAA. $gdalwarp -s_srs EPSG:3411 -t_srs EPSG:3857 northpsg.20141027 ...
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1answer
88 views

Warping images with unknown projection

I have tried to used gdalwarp to project set of images(from hdf4 files to tif) before merging them using gdal_merge. But then the merge output has spaces/blanks. They're not merge properly, and I ...
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2answers
267 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 ...
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2answers
939 views

Coordinate system of a MODIS file to be introduced in GDAL for transformation

I am working on MODIS data using GDAL. When I extract coordinate system information of the files I got this: Coordinate System is: PROJCS["unnamed", GEOGCS["Unknown datum based upon the custom ...
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1answer
70 views

How can I access the bands of a grib file with gdalwarp?

How can I access the subdatasets of a grib file? I am working with NLDAS data and I want to process only the first band of the grib file. I know how to do it with HDF data but I couldn't handle it ...
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6 views

Gdalwarp in maptilerpro command line

-crop_to_cutline Trying to use -wo command in Map Tiler Pro inside a myarguments.txt source input text file tried it many ways with no success
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32 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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22 views

GDAL Warp cuttline not working

Has anyone ever got the cutline to work in C++? I have it working off the command line no problem, but it doesn't seem to do anything when I populate that argument in C++ as below: *//Create a ...
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22 views

Error in warping the merged hdf4 files

I've tried to merge a set of hdf4 files(unknown projection) and it run well. But when I tried to warp the output of the merge hdf4 files an error like this appears: ERROR 1: Unable to compute a ...
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1answer
220 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 ...
2
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1answer
148 views

Reprojecting MODIS Ice Sea Temperature products with gdalwarp

I have problems projecting MODIS Ice Sea Temperature (IST) products to EPSG:3031 (Antartic Polar Stereographic) using gdalwarp. The product I'm working with is MOD29E1D, documented here, p33: The ...
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0answers
48 views

Problem when converting to LCC projection

I am very much so a beginner.. but here goes. I have two maps that should line up with each other, but their projections are different. I've tried to use the gdalwarp utility to match them up, but ...
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2answers
241 views

Gdal: clipping a raster with another raster

I'm writing a simple utility to crop batches of multi-band geotiff raster files to the same (smaller) area. Using gdalwarp, I can easily crop a file using a single-polygon clipping shapefile: ...
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1answer
144 views

Creating a mosaic with gdalwarp - How to deal with no data and overlap

I want to create a mosaic of satellite imagery in .tiff format. I want to create an actual mosaic, not a vrt, because afterwards I will cut the image in to tiles that make sense for my users. Gdal ...
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3answers
3k views

gdalwarp cutline along with shapefile

I am trying to clip my Raster file according to a shape file geometry. I am using the following code gdalwarp -cutline INPUT.shp INPUT.tif OUTPUT.tif But it is resulting a black color outside the ...
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52 views

gdalwarp hdf problem

I am working with some hdf files. The following command works on my Mac. command = gdalwarp -of GTIFF -tr 1000 1000 -tps -s_srs "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs " -t_srs ...
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83 views

gdalwarp with NETCDF files

I have been looking for it for a while but couldn't find what exactly I need. I have WRF outputs in NETCDF format and I want to convert them to Geotiffs with gdalwarp. I think my -s_srs should be ...
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56 views

hillshade and slopeshade geotiffs fail to convert to new projection using gdalwarp

I'm trying to convert my three DEM products (colour, hillshade and slopeshade; the latter two generated using gdaldem) from EPSG:4326 -> EPSG:3857 using gdalwarp, via the command: gdalwarp -of GTiff ...
2
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1answer
73 views

GDAL Warp to clip a .tif: Works fine standalone, won't work in Python

I am trying to use the subprocess module to call gdal warp and clip a .tif using a shapefile. When I try the command in GDAL it works fine, but when I attempt to call it into a Python script it will ...
3
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1answer
68 views

Gdalwarp with “out of globe” values in sinusoidal projection

I want to project a global image (source ERA INTERIM) from WGS 84 to sinusoidal, using gdal 1.11 and bilinear resampling. It work fine BUT I have values everywhere on the rectangular extent of the ...