GeoTIFF is a public domain metadata standard which allows georeferencing information to be embedded within a TIFF file.

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3
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0answers
52 views

can I preserve a fading alpha layer when mosaicing images with gdal?

I am mosaicing some images with gdal and would like to improve the final result by using a fading / gradual alpha layer towards the edge of each image to remove the sharp edges in the middle of the ...
1
vote
0answers
56 views

Georeferencing reversal of image

I georeferenced a map and it posted to canvas as a mirror image of the original map. I set my project CRS before starting and also made sure to set the same SRS for the Geotiff being created and ...
0
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0answers
23 views

How to export/reproject GEOTIFF with UTM latitude band from ENVI

I'm trying to export GEOTIFFs from ENVI 5.1 SP1 to an app (GIS Pro on an iPad) that seems to require that the zone represent the latitude band and not the hemisphere (e.g. 30U, not 30N). Is there ...
0
votes
1answer
80 views

How to place an numpy array into GeoTIFF image using python-gdal

I am attempting to export data of varying scales into GeoTIFF images...a new method for me. The problem I'm running into is when using the GDT_Byte pixel type, data values < 0 and > 256 are not ...
2
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0answers
29 views

Converting georeferenced .pdf to .tiff in ArcGIS for Desktop? [duplicate]

I am attempting to convert a USGS georeferenced pdf to a tiff. I found this help page, which looks pretty simple: ...
4
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1answer
477 views

Programmatically export to geotiff in different scales from ArcGIS Desktop?

I would like to programatically export geotiff files in different scales (e.g. 1:25000, 1:50000 etc) using arcgis10. As input I have some shape files and a DEM file as well as a corresponding style. ...
2
votes
1answer
152 views

Properly Converting from UTM to Lat/Long with gdalwarp

I have a file in GeoTiff format in UTM coordinates. I convert the file to LatLong, then back to UTM, and the coordinates aren't what I started with. I have the printout of the process below. ...
6
votes
2answers
143 views

How to convert the geographical projection of an extremely large file (GDAL)

My Task I need to convert 9 x 14Gb GeoTiff files to WGS84 geo projection. The rough size in pixels is about 200k x 100k. The data-type is byte and it is not a subject to interpolation, it is some ...
2
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2answers
154 views

Does a SRTM DEM image show details such as fields?

I'm working through the QGIS Training Manual where I have a step to get ... ... raster images (SRTM DEM) which cover the region you have selected for your course. SRTM DEM can be ...
3
votes
1answer
94 views

How do you classify unclassified pixels in a land cover geotiff tile?

While printing out the raw pixel values of a GEOTIFF land cover tile I found 90 % of pixels have normal values i.e. those that the documentation describes (8 bit integers describing a land cover ...
0
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1answer
38 views

Open Source Webmaps and Geotiffs

I have recently started to learn how to use open source web maps, and have come across the following issue. When using geoserver and geo explorer (part of the open-geo-suite), I seem to get an ...
0
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0answers
52 views

Importing spatially referenced geotiff from MicroStation V8i into ArcGIS

I can't figure out how to properly import a geo-referenced raster into ArcGIS from MicroStation. Both the design file and the Arc data frame are in the same projected coordinate system, which is ...
1
vote
2answers
99 views

Reversing “combine” function on raster using R?

I have a raster that I think was "combined" using an ArcGIS function. I am wondering if there is a way to extract just one raster layer from the combined dataset in order to use it separately, using ...
0
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0answers
41 views

load raster (geotiff files) to postgis with url

I tried to load rasters to postgis with raster2pgsql but this not satisfy my project because it uses local files. i have 5000 and will be more in future geotiff files in cloud host. is it possible ...
1
vote
1answer
37 views

Create GeoTIFF from TIFF with Java

I create a tiff file from a bufferedImage in Java. I have some GCP (Ground Control Points) and I would like to make a GeoTiff. I know the GeoTIFF jai but this library is not updated since 2001... Any ...
1
vote
2answers
271 views

Can QGIS export Geospatial PDF for Avenza PDF map app?

Since QGIS uses GDAL, does any map exported as a PDF become a Geospatial PDF? I am hoping to import maps from QGIS into the Avenza PDF Map app on my phone. Previous posts mentioned exporting as ...
0
votes
1answer
37 views

creating a pyramide tiles of a geotiff using gdal

I have a big geotiff file (about 300MB), and I saw an example of a big data organized in folders : folder 0 contains one folder 0 which contains one .png file named 0.png folder 1 contains two ...
0
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1answer
57 views

Import BigTiff files in Grass

I am trying to import a raster (geotiff) in Grass with size of 64 GB . It makes me an error like this: ERROR 4: This is a BigTIFF file. BigTIFF is not supported by this version of GDAL and libtiff. ...
1
vote
1answer
57 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, ...
1
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0answers
28 views

Export only one value from a one-band raster

I have a PostGIS database with a georeferenced raster, with one band which contains values from 0 to 255. I should export it to a transparent GeoTiff picture in which the only visible pixels are those ...
0
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0answers
29 views

GeoTiff error when building Jar with GeoTools

I'm seeking some help with GeoTools. I've been using it for a school's project, I had almost no problem until now. But now that my project is done, I've tried to build an executable jar with the ...
1
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0answers
67 views

Convert grey,green,blue to red,green,blue tiff

==== Edit ===== Issue tracked to strange behaviour of gdal_warp when -dstalpha is specified and source is RGBA. I had assumed that the grey,green,blue tiffs (see example below) were genuine and ...
7
votes
3answers
546 views

Precision vs Resolution in elevation data

Update: A good example of something I am confused about: on the Wikipedia page for "digital terrain model" one can find the following statement about a satellite in the "See Also" section: ...
1
vote
1answer
64 views

In a GeoTiff, what unit are extents in?

I was looking at the GDAL metadata of a USGS GeoTiff quad (o48118e8) with the GdalToTilesWin program. It dumped the following info: Name o48118e8.tif Size X/Y 5315/6780 ResolutionX/Y 2.4384/2.4384 ...
0
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0answers
68 views

mbutil export of mbtiles png files are all corrupt

I have an mbtiles file that I created with MapBox studio from a GeoTIFF source, and when trying to export the mbtiles with mbutil, all the images are corrupt, no matter if I try png or jpg. Has ...
2
votes
2answers
512 views

how to open geotiff as base layer on openlayers

i want to add a geotiff image as base layer on openlayers : copy my image.tiff in a directory and open it with openlayers directly without using a cartography server.
2
votes
2answers
4k views

How to display a geotiff-image with OpenLayers at the “right place”?

I'm just starting with OpenLayers. I have a georeferenced geotiff and the associated world file. Now I want to display this image as an Overlay and google-maps as baselayer with OpenLayers. Would be ...
6
votes
5answers
11k views

Batch convert GeoTIFF's to KMZ files

I have about 600 GeoTIFF map files, each about 140 mb in size that I'd like to convert to KMZ files so people can download them and use them with Garmin GPS units, Google Earth, etc. Anyone know an ...
0
votes
0answers
101 views

Creating geoTiff from MBTiles

I have mbtiles file with various zoom levels (8-14) and I want to create geotiff file from it. I think that this could be acomplished with gdal but I dont know how. Any suggestions on how to complete ...
2
votes
3answers
109 views

How to export a GTiff with its GDAL colour table, in GRASS, which is suitable for Adobe Illustrator?

I've created a new raster in GRASS, starting from a dem and using the commands r.relief and r.shade. Now I would like to export this new raster as a georeferenced image and import it in Adobe ...
13
votes
3answers
8k views

How do I change geotiff “no data” color to white/transparent rather than black?

I am preparing data for inclusion into a geonetwork node, where the maps are displayed via geoserver. The problem is that cells that have"no data" are displaying as black in the geotiff and I am ...
2
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0answers
38 views

tfw world file in decimal degrees?

I want to understand how "world files" are created. I found some definitions, like: http://en.wikipedia.org/wiki/World_file which says that the 2 last lines in the file are x and y coordinates of ...
23
votes
6answers
7k views

Should GDAL be set to produce GeoTIFF files with compression? Which algorithm should be used?

I have a folder of GIS data that consists mainly of GeoTIFF files. The whole set weighs in at about 1.2 GB. I noticed that if I pack the contents into a tarball, it smashes down to about 82 MB. I ...
0
votes
0answers
50 views

HDF to Geotiff conversion

can anyone tell the program code or script for converting HDF files to geotiff using MRTSwath tool? I've downloaded MODIS Files for fog estimation but i couldn't find how to process them.
0
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2answers
166 views

How do I mask a raster in TileMill?

I've tried just about every single TileMill compositing operation on the vector and raster layers in question, and I have to admit that I can't figure it out: How the heck can I mask a raster with a ...
1
vote
1answer
75 views

mosaicing geotiffs with gdal creates gaps due to alpha layers

I have a series of geotiffs which I'm trying to mosaic together, however when they are combined their individual alpha layers overlap sections of the other images and create gaps in the final mosaic: ...
1
vote
1answer
179 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 ...
0
votes
0answers
81 views

gdal_merge tries to create image with negative dimensions

I am trying to use gdal_merge.py to create a mosaic from a set of geotiffs, however the command fails with the error message: "ERROR 1: Attempt to create -3510x1817 dataset is illegal,sizes must be ...
0
votes
1answer
55 views

Can GDAL with “Kml Super Overlay” output a georeferenced geoTiff from a kmz?

I've got a kmz containing an unrefrenced jpg and a boundary box in kml. ogrinfo is happy to report (filenames redacted): INFO: Open of `Sim[...].kmz' using driver `LIBKML' successful. 1: Sim[...] ...
3
votes
2answers
385 views

GDAL rotate DEM

Is it possible using any of the command line GDL tools such as gdalwarp, etc to perform a rotation of DEM data - a GeoTiff for example? Anyone know how to do this? UPDATE1 After clearing out ...
0
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0answers
11 views

Where can I obtain Landsat7 senes in FAST (.FST) format?

I have scripts written such that will only process Landsat7 scenes in the FAST (.Fst) format. I was wondering where can I download such scenes? Also, is there a way to convert Geotiff format Landsat7 ...
5
votes
2answers
2k views

GeoTiff size - what to do?

I have a whole series of GeoTiff tiles, each one about 250mb in size, in total just over 90gb. I want to be able to display these as a wms into QGIS to 20+ GIS users and in the end make them into a ...
0
votes
1answer
48 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 ...
2
votes
0answers
213 views

Merge several images and Export a GeoTiff File

I have approx 500 geo-referenced images that I was hoping to merge into 1 geo-referenced file, and export it as a single geotiff file. To be used in AutoCAD Civil 3D I know I am pushing my luck and ...
1
vote
2answers
5k views

How to add georeferenced TIFF to AutoCAD 2010

I have a ~6GB georeferenced (from ArcGIS) .TIFF satellite image that a colleague wishes to add to AutoCAD 2010. He wants it as a base layer for digitising features from. I have searched forums but ...
1
vote
1answer
92 views

Adding a GeoTiff created in QGIS to Map Box

I have created a heat map in QGIS and have successfully exported it as a Geotif file. I exported the file as a Rendered Image to include my classifications and colors. However when I pull the data ...
3
votes
1answer
85 views

Why does projection WKT differ between osr.SpatialReference and gdalinfo

I am writing a simple geotiff using the GDAL python bindings, but the projection WKT reported by gdalinfo differs from the source. The script from osgeo import gdal, osr import numpy # Create ...
0
votes
0answers
46 views

I need to host imagery though a WMS service from an Ubuntu box. What software stacks will work for me?

Our DRS Spits TFW and TIF files to a directory for imagery. I need to be able to automatically grab these files and host them via (possibly a password protected) WMS. The basic use case is this: ...
0
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0answers
65 views

How to get elevation of a coordinate given a dtm file out of a PostGIS?

What would be the best way to get elevation of a coordinate out of a PostGIS database (SQL/plpgsql) given a GeoTIFF dtm file? Importing as PostGIS Raster (which seems more costly) and calling ...
0
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0answers
75 views

Cloud layer over lay openlayer - kml

I currently have an open layer map which to overlay satellite images of cloud cover which I have available as GEOTIFF. I have manipulated these using the gdal utilities to extract the band containing ...