GeoTIFF is a public domain metadata standard which allows georeferencing information to be embedded within a TIFF file.
18
votes
5answers
2k views
How to determine if a tiff is georeferenced or not?
I received a tiff file from someone, but I'm not sure if it's georeferenced. Is there an easy way to check this?
15
votes
5answers
607 views
Speed of various raster data formats
I'm having trouble locating any discussion or comparative benchmarking of different raster file formats (e.g., for use in data analysis in R). Does anybody have any insight into why particular formats ...
14
votes
6answers
3k 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 ...
13
votes
3answers
4k 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 would ...
11
votes
2answers
555 views
GeoServer: Best way to publish 2500 TIFF or 71 ECW files?
I have ortophotos of an area that I need to serve as a background map for my vectors. I got it as 2500 files (71,5MB each) in raw TIFF format with corresponding TFW word file - 180GB of data. ...
10
votes
2answers
251 views
How to reproject raster from 0 360 to -180 180 with cutting 180 meridian
I have a geotiff raster image that has a coordinate system with longtitudes from 0 to 360.
The horizontal center of the image is 180 longtitude. See image below:
I want to transform it to EPSG:4326 ...
8
votes
3answers
1k views
gdalmerge produces file that is much too large
I'm trying to merge 60 geotiff files into one huge file in order to be able to product tiles from that resulting huge geotiff file by using gdal2tiles.
The merge process worked, but for some reason ...
8
votes
3answers
573 views
Best way to manage large number of geoTiff rasters
I have around 2-3000 1-bit geoTiffs of size 11000x9400. Color 0 should be transparent, and QGis gets it wrong in the first place, so I used a .vrt file to set all the parameters in one single place.
...
8
votes
1answer
279 views
What is the correct way to convert a USGS Orthoimage from WorldImage format to tiled GeoTiff for GeoServer?
USGS provides different resolution orthoimage quadrangles in the WorldImage format (*.tif with an accompanying *.tfw world file). Some of these quadrangles can be used by GeoServer (2.1.0 - 2.1.2) by ...
7
votes
4answers
2k views
Reading GeoTiff using .NET
Is there a managed library for reading the coordinates from a geotiff file in .NET ?
I know it can be done thru GDAL, but I am looking for a managed alternative.
7
votes
2answers
270 views
Does anybody know a service that exports OSM maps to georeferenced GeoTiff files?
Does anyone of you know if there is a service available for exporting OSM-maps in the Geo-Tiff format?
best regards
desputin
6
votes
2answers
143 views
How to use GDAL to convert Int16 data to Byte
I have some data with Int16 bands in HDF format.
I want to convert this to Byte bands in GeoTIFF format.
The data range for the Int16 is -2000 to 12000, so I want to map this to the Byte range 0 to ...
6
votes
1answer
506 views
Creating a mask with transparent pixels in python
I have a geotiff image with pixel intensities ranging between certain values. Lets say bewteen -2 and 2 (the image is normalized). I have a certain threshold which interests me, lets sat 1. I would ...
6
votes
1answer
297 views
How to get latitude, longitude and altitude database from a GeoTIFF file?
I am developing an AR iOS application. When the iPhone gets the current location, it has to calculate locally the visible point. I want to read the tiff files in my application, and then get the ...
6
votes
1answer
377 views
BigTIFF support in libraries?
What is the level of support for BigTIFF in image processing libraries?
GDAL supports this functionality so long as you're building against libtiff4(beta), and I would assume most open source C ...
6
votes
2answers
388 views
How to add Time info to GeoTiff served from Geoserver?
I have a geotiff file (somedata.tif) that I want to serve from geoserver wms associated with the time 10/22/2010 12:00:00.
I'm currently using a geoserver raster data source of type GeoTiff pointed ...
5
votes
2answers
697 views
How can I write a GEOTIFF in C#?
I want to upload a jpeg or some raster image into a C# form and then on entering the latitude and longitudes I need to be able to create an GEOTIFF file of the same image.
How can this be done in ...
5
votes
3answers
896 views
Easily find centre point of a raster in ArcMap 10 document?
If I have, say, a rectangular and georeferenced raster file loaded in an ArcMap 10 document (.tiff w/ associated tfw), how do I easily find its centre point and store that point in a points vector ...
5
votes
2answers
235 views
Mass-update the projection in compressed GeoTIFF files
I have a huge set of compressed GeoTIFF files. Someone forgot to set the projection while creating the GeoTIFF files and I would like to add it now.
If I use
gdalwarp -t_srs source.tif ...
5
votes
2answers
2k views
GeoTIFF file creation from .Tiff file
im not sure if this question is suitable for GIS
I'm working on a software that displays a map, like this
![enter image description here][1]
i also have some export functions which exports the the ...
5
votes
1answer
423 views
Why do TIF loaded into PostGIS lose their colormap?
I have successfully loaded a TIF image (using raster2pgsql) into my PostGIS 2.0.1 database. I can load the raster image into QGIS and it displays in the correct space. However, it has lost all colour ...
5
votes
3answers
6k views
Steps to creating a GeoTIFF
First off, I'd like to mention that I'm pretty new to working with GIS, so please forgive my inexperience.
My situation is as follows: I'm tasked with georectifying a set of imagery and importing ...
5
votes
1answer
274 views
Why does a TIF file lose projection information when a pixel value is changed?
I am trying to change the pixel value of a tif file (containing projection information) but after the pixel value is changed it is losing projection information.
I am using the Python imaging ...
5
votes
3answers
4k views
How to create TFW and PRJ files for a bunch of GeoTIFFs?
I have a folder which contains a large number of files in GeoTIFF format. I need to generate both PRJ and TFW files for each of these images. Is there some slick way of doing this?
Thanks!
Joe
5
votes
2answers
168 views
“Poor” quality when zooming out a WMS-Layer based on GeoTiff data
i am having some issues when using the Geoserver Web Mapping Service to display GeoTIFF-Files. When zooming out (in an OpenLayers-Client or in the Geoserver Layer Preview for instance) the quality ...
5
votes
2answers
508 views
Big Satellite Image Processing
Im trying to run Mort Canty's http://mcanty.homepage.t-online.de/ Python iMAD implementation on bitemporal RapidEye Multispectral images. Which basically calculates the canonical correlation for the ...
5
votes
2answers
227 views
Problem Visualizing 3D Terrain Model - USGS DEM
I recently downloaded a GeoTIFF 1 arc second from the USGS National Map Viewer. I added the raster to ArcScene and attempted to visualize the data in 3D. I set the Base Height to Floating on a ...
5
votes
1answer
687 views
GeoTiff format (tile and overview confusion)
I have two questions :
How does tile creation in geotiff improve performance and how will reading of tiled gtiff images be done?
Adding an overview to a geotiff image means we are resampling the ...
5
votes
3answers
769 views
How to generate colorful images using GDAL?
I am using gdal_translate -of JPEG -scale -co worldfile=yes ndvi.tiff output.jpg command to convert tiff images to jpg and resize it. But it generates only black and white images.
How can I generate ...
5
votes
1answer
206 views
Determining Natural Origin for a GeoTIFF file (Lambert Conic)
I am trying to display an existing GeoTIFF file (from the FAA WAC set) in an application that requires the GeoTIFF NaturalOriginLongitude tag (FalconView 5.1.1). There are some older files in that set ...
4
votes
1answer
588 views
What's the best way to display a huge Aerial image using Geoserver
I have an Aerial image - Almost 1.5 GB , GEOTIFF - and i have been trying to add it as a layer in Geoserver ..
Adding the layer went successful , but the performance were very bad .
I tried to cache ...
4
votes
1answer
392 views
Extract coordinates for series of georeferenced files in ArcGIS 10?
I have a series of 1900 spatially continuous images that are georeferenced. Each image is a tif file paired with a tfw file.
These images are easily open and shown in ArcMap 10. However, I need a way ...
4
votes
2answers
848 views
How to use NASA Digital Elevation model data?
I've heard it is possible to use NASA elevation model to determine approximate elevation at (lat;lng) point.
This might be really useful for my upcoming project since Google Elevation API has weird ...
4
votes
1answer
139 views
Arcgis: Programmatically export to geotiff in different scales
I am totally new to ArcGis so please bear with me using the wrong terminology.
I would like to programatically export geotiff files in different scales (e.g. 1:25000, 1:50000 etc) using arcgis10.
...
4
votes
1answer
276 views
ImagePyramid tuning in Geoserver
I am running several WMS layers from a GeoServer (2.2 RC3 at the moment of writing). All layers are ImagePyramids with sizes ranging from 100GB to 1TB in size.
I have read the GeoServer on Steroids ...
4
votes
2answers
343 views
Display Georeferenced Images on Android
I'm looking for an Android application (best would be Open Source), that can display georeferenced images on top of a map (Google, OSM, ...).
By Georeferenced I mean that the images four corners are ...
4
votes
2answers
411 views
Extract all pixels of given RGB value and render as MultiPolygons
Given a geotiff image with a colortable in it, what is the easiest way to extract each color as its own "layer or shapefile or multipolygon object"?
Specifically, I am looking for a programmatic ...
4
votes
1answer
70 views
How to determine correlation between two databases?
I need to perform some tests and verifications on databases and/or datasets.
I need for example to analyze two databases and then determine if there is enough correlation between both.
My main issue ...
4
votes
1answer
157 views
Recoloring geotiff for visual presentation
I have a rather big Geotiff. It is the mosaic of four RapidEye satellite images. They are all a bit bland/grayish. When combined I would like to freshen up their colors so that they are more visually ...
4
votes
1answer
138 views
How to show a geoTiff on an iOS application?
I'm developing an iOS application that will use offline maps. These maps are on GeoTiff format but I don't know how to do it.
I've found this question: How to display a GeoTIFF on mapView but it uses ...
4
votes
1answer
211 views
What are the benefits of RGBI Geotiffs vs ECW format?
I just received a batch of imagery for my project area in 2 formats: Geotiff (RGBI) and ECW. The imagery looks very similar and covers the same footprint, but the file size difference is massive: ...
4
votes
3answers
113 views
Is it possible to include information about a neatline in a GeoTIFF?
Is it possible to include information about a neatline in a GeoTIFF? If so, how? What software will produce them?
3
votes
2answers
843 views
how to convert qgis generated tiff images into jpg/jpeg using gdal command line utilities?
I want to develop a web portal that will show the images dynamically produced by qgis . but qgis provided tiff images are too big in size and it is not possible to show it on website using image ...
3
votes
2answers
152 views
Convert multiple TIFFs into one?
I have downloaded the Blue Marble dataset, and it consists of eight GeoTIFF images, labeled like this:
A1 B1 C1 D1
A2 B2 C2 D2
I would like to use these tiles for GeoServer to be served as WMS. ...
3
votes
1answer
743 views
How to read GeoTIFF using PHP?
My current pet project involves creating a web service that uses the CGIAR SRTM worldwide elevation data set. Each request to the service will query for elevation data from a small geographic area.
...
3
votes
2answers
395 views
programmatically create and publish geotiff layer in geoserver
We need to automatize process of creating datastore and publishing geotiff layer. Also, before publishing we need to change Declared SRS and to save Native Bounding Box to our database.
Geotiff file ...
3
votes
1answer
84 views
rgb2pct.py increases size of file 20 fold!
I wanted to reduce the number of bands of a tif file from 3 to 1...
I used this command
rgb2pct.py -n 256 fnp_braunschweig.tif fnp_bs.tif
and it increased the size from 31mb to 778mb
I actually ...
3
votes
1answer
228 views
How to handle a geotiff map together with points with openlayers (or other libraries)?
I create a lot of printed maps using various applications (ArcGIS, QGIS, Microstation, Illustrator etc). Sometimes I'd like to turn this map somewhat interactive on the web.
What I'm looking for is a ...
3
votes
1answer
701 views
How to get GDAL to create statistics for GTiff in Python
I regularly create my own GeoTIFF rasters with GDAL in Python, e.g.:
from osgeo import gdal
from numpy import random
data = random.uniform(0, 10, (300, 200))
driver = gdal.GetDriverByName('GTiff')
ds ...
3
votes
2answers
647 views
JPG file all black when added as raster in QGIS
I add a new raster layer in the latest QGIS and select a JPG file, but it is all black. I tried adding the TIF version of the same image and that worked.
What is it with the JPG, and how should I ...
