Imagery refers to raster based datasets acquired from sensors on satellites or aircraft.
1
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0answers
12 views
ESRI imagery service that is WMS Compliant
I want to use the ESRI free online imagery service
http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer
But I want a service that is WMS compliant.
Is there a version of ...
1
vote
1answer
17 views
How to detect which Quickbird data product?
I have some Quickbird imagery, for further processing I would like to know what kind of data product are these images. The imagery only has an additional text file containing some order numbers.
...
3
votes
3answers
121 views
Which Software can derive building footprints from imagery?
I'm looking for a software solution that can process large areas of imagery to produce building footprints.
For the area of interest, I can source either satellite stereo pairs or oblique imagery. I ...
1
vote
0answers
36 views
Is there a tutorial explaining the basics of WMS?
I'm building some software that needs to download satellite map images to display behind some survey charts. I understand that, to download these images, I need access to a Web Map Service. The only ...
2
votes
1answer
45 views
Atmospheric Calibration for Landsat 7 ETM+ Gap Filling
This is for thesis work involving mapping of above-ground mangrove forest biomass using Landsat 7 ETM+ imagery.
I am assessing correlations between biomass with vegetative indices, e.g. NDVI, and ...
0
votes
1answer
36 views
Issues calculating NDVI from ASTER
I'm having an issue with ASTER data.
I have two mosaics; one for 2008 and one for 2012. Both are composed of 4 ASTER scenes and the scenes are all from the same two month period (i.e. no seasonal ...
1
vote
1answer
77 views
How to adjust online basemap to Arcmap
How can I adjust the online basemap imagery file to our existing ArcMap data. Below are steps I perform to add the basemap data.
I Added basemap from "Add Data From GIS Online" in the file menu and
...
1
vote
1answer
44 views
gdal_merge.py with single band raster
I'm trying to mosaic the True Marble world imagery 250M geotiffs using gdal_merge.py though one of them doesn't have RGB bands like the rest and gdal_merge fails (same number of bands is listed as a ...
1
vote
0answers
233 views
Recomputing footprints on old satellite imagery [duplicate]
I am trying to create an image service out of some 1976 satellite imagery. But first I need to get all of the no data cells out of my mosaic dataset. I have tried to recompute the footprints on my ...
3
votes
3answers
93 views
Pictometry Accuracy and/or Alternative
I'm looking for some insights into the accuracy (x,y,z) of oblique imagery from Pictometry in terms of providing accurate measurements for property evaluation. Is the high cost of this product ...
5
votes
3answers
738 views
Mosaicing many large ECW files for display in ArcGIS Server apps
I have about 200 ECW files of recently acquired 1-foot resolution aerial photos. Its about 15GB worth, covering over 250 sq. miles. Unfortunately, you need a license from ER Mapper that runs about ...
3
votes
2answers
92 views
Tasseled Cap Transformation Rapid Eye
I want to do tasseled cap transformation on rapid eye data. the main question would be about the parameters which are used. Somebody has a suggestion?
0
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0answers
25 views
Can't open ArcGrid created by Seamless viewer from NED [closed]
I have been unable to add elevation rasters generated by, and downloaded from the USGS's Seamless viewer, http://seamless.usgs.gov/website/seamless/viewer.php from the National Elevation Dataset ...
4
votes
3answers
139 views
How to crop a satellite image?
I am wondering how to or if it is possible to crop a SPOT satellite image (the image has black edges) using ArcMap 10 and if so how do you do this. I appreciate any advice.
9
votes
2answers
267 views
What countries allow commercial use of drones to collect aerial imagery?
Currently the US government forbids commercial use of drones to collect aerial imagery. The FAA is supposedly reviewing this to determine what sorts of restrictions are needed to allow this to happen ...
10
votes
6answers
845 views
What is this “brown spot” in Google maps?
I was in Google maps today and noticed near Baltimore, US where the river is, there's a huge brown spot. Is this due to all of the waste? If so, will this keep going all the way into the ocean?
6
votes
1answer
554 views
What causes these shiny artifacts in Google Maps imagery?
Do you know what causes artifacts like this one:
Source: ...
2
votes
2answers
87 views
Is there a source for leaf-off aerial imagery?
I am looking for leaf-off imagery for Oklahoma, Kansas and Texas. 1m leaf-off imagery would be ideal, although any substitute would be helpful. I need fairly high resolution imagery to distinguish ...
2
votes
3answers
175 views
Finding Satellite Imagery For Use Without Internet Connection
So, I am not a GIS expert. I just write software and I've done some work with ArcMap, ArcGIS Server, and FalconView. What I need is world wide satellite imagery I can use on a local machine. Street ...
1
vote
1answer
64 views
trouble with i.landsat.toar failing to identify satellite
I am trying to use the i.landsat.toar tool on L7 bands. I have tried to use both the MTL and MTLold, but no matter what I try, it returns "Failed to identify satellite." What am I doing wrong?
0
votes
0answers
89 views
Moving files in OS street view? [closed]
I have selected all the TFW files. How do I 'move' them to the Street View SX > data > sx folder ? There is no copy and paste facility and not sure whether I need to extract them?? (Never used this ...
0
votes
0answers
41 views
How to perform Neural Network Classification?
I'm using ENVI 4.8.There are some problems on parameters for Neural Network in Envi.(Envi-Classification-Supervised-Neural net)
There are 5 bands and 12 classes that i have used for my study .
The ...
1
vote
3answers
290 views
Free Imagery WMS Feeds in QGIS
I was wondering if anyone knows of a free WMS of imagery that I could use within QGIS. The imagery does not have to be high resolution (Blue Marble even). I would like to have a base imagery feed ...
3
votes
4answers
148 views
Place image without using points in QGIS
I am trying to find a GIS software that does this, so I am trying QGIS but other suggestions are welcome.
I have a basic shp boundary such as a rectangle. I want to be able to import an unreferenced ...
3
votes
3answers
1k views
How do I set pixel values to nodata in QGIS?
I have an image which i cliped with an AOI polygon. The contour area was set to pixel value = 0 and I have a nodata value of -32768. I want to redefine the nodata value into zero. I used to do this ...
7
votes
3answers
226 views
Where can I get aerial images for commercial use?
Related question: Free aerial map images for commercial use - Alternatives to Google maps
I'm looking for a service that will allow me to download images at up to 1 meter resolution. Currently our ...
6
votes
1answer
155 views
Coordinate system in aerial imagery
I am calculating WGS84 coordinates of points in an aerial image, given the WGS84 coordinates of the center of the image and the ground distance width and height (calculated from altitude and lens ...
5
votes
2answers
201 views
Extract certain area of contours/satellite images
I have 2 satellite images (jpeg2000 format) and 2 xyz-files from the same area. I am trying to extract certain region from the area including contour lines and the satellite image in order to import ...
7
votes
2answers
115 views
How to perform enhancement operations on an satellite imagery in QGIS?
I am a new user of QGIS please suggest how to perform image enhancement operations on an satellite imagery like ratioing, contrast stretching, edge engancement, filtering etc. in QGIS?
1
vote
2answers
383 views
Where to download 4 band NAIP imagery?
I seem to recall USGS Earthexplorer providing current and historic 4 band NAIP imagery over the last few years. It appears that these data have been migrated to the National Map. However, the ...
1
vote
1answer
100 views
How to programatically replace ArcGIS Online image with new imagery in mxd's?
I have many mxds that previously used ArcGIS Online Bing imagery. I want to replace those with newly purchased imagery. I know I need to use the arcpy.mapping.MapDocument module to do this though not ...
3
votes
1answer
108 views
How to easily import aerial imagery into gvSIG?
I have used ArcView GIS 3.x for years. I have decided to try some of the free GIS desktop software. I am now trying gvSIG. One feature I was hoping for was the importation of aerial imagery relatively ...
1
vote
0answers
134 views
Raster satellite images for QGIS
When I try to apply a downloaded GIS satellite (t=rimage to Quantum, it doesn't seem to open properly. There must be a step-by step description on how this would be done effectively. Can anyone tell ...
3
votes
1answer
105 views
gdal_warp of multiple rasters keeping maxium intensity value
I have multiple rasters which overlap eachother geospatially but do not completely occupy the same space. I can combine them with gdalwarp like:
gdalwarp -s_srs EPSG:4326 *.tif larger_output.tif
...
7
votes
4answers
311 views
Visualization of satellite image - directly in python
Is there any way (a package or what not), to visualize a geotiff image directly in Python? I don't want to use ENVI or ArcGIS or anything else. Thank you in advance.
3
votes
1answer
25 views
How to know the required scene required to cover an area?
I want to know how to find the nos. of scene of LISS 4 data required to cover an area(say 84000 sq km)? any suggestion/solution/calculation?
3
votes
2answers
65 views
How many stereo satellite imagery required to prepare DEM of an area?
I want to know how to find the nos. of scene of stereo CARTISAT-1 data required to prepare DEM of an area(say 84000 sq km)? any suggestion/solution/calculation?
7
votes
4answers
486 views
Where can I download free satellite imagery of Cambodia for offline use?
I am an entry level GIS user - I have had one semester of GIS in college.
I have successfully downloaded raster satellite imagery from Seamless (tiff files) for my class project.
Now I am trying to ...
11
votes
2answers
383 views
How to equalise colour, brightness and contrast across several scanned paper maps
I am a vectors guy mostly, but for a current project I need to work with a bunch of old scanned paper maps (ww2 bomb damage maps for London, if your interested!)
We scanned and georeferenced the ...
0
votes
0answers
59 views
Why does publishing a Map Service from MXD turn Imagery Grey
When creating a map service from an MXD I'm running into an issue where my imagery is turning completely grey.
I start with an MXD which has my mosaicked image and I publish it to a map service (no ...
2
votes
0answers
138 views
Automated testing for GIS apps
There are several commercial and opensource tools for regression automation. While many of them could be employed to test GIS apps, they fall short, at times, dealing with the unique characteristics ...
2
votes
2answers
167 views
How to identify image footprints of an aerial photograph
I need a tool that will take aerial images with Lat, Long, and Alt in their EXIF data and produce foot prints of the images. We need to verify that the images cover the photographed area with proper ...
1
vote
1answer
133 views
Is there a way of viewing a photo has a point tag from Photo2shape in QGIS?
Is there a way to view images (photos) that have location point from Photo2shape by clicking on the point in QGIS?
1
vote
1answer
72 views
Is there an image service from GOES available for ArcGIS?
I have an arcmap project using an arcims service from NOAA ENC (http://ocs-spatial.ncd.noaa.gov) but maybe the service is unavailable right now and I can't access to imagery...
Is there an image ...
12
votes
3answers
368 views
Alternative vegetation indices
I have been using NDVIs with limited success to identify trees in the central Great Plains region of the USA. The problem I have been encountering is that reflectance from farm fields/pastures have ...
2
votes
1answer
356 views
Convert 3-band raster imagery to distinct vector zones in ArcGIS
So much like the title says I would like to convert a 3-band infrared image TIF file of vegetation into distinct vector feature zones using ArcGIS. I'm guessing the only way to do this is with ...
5
votes
2answers
535 views
Creating a multispectral image from scratch
I want to make a multispectral image from cero to do some tests on it. Something really simple like 5 completely uniform bands with salt and pepper noise on them or a square of different values at the ...
0
votes
0answers
88 views
Change Detection on bitemporal multispectral images - data simulation
I want to try several "backgrounds" for change detection on bitemporal images (satellite images of the same place but in different moments in time). Images consist of 5 bands. I have python ...
4
votes
2answers
145 views
Wavelet vs Discrete compression for imagery
What is the main reasons to choose wavelet (jp2, sid, ecw) instead of discrete (JPEG) compression methods for raster data?
Lets limit this question to aerial imagery and lossy compression.
Why ...
3
votes
2answers
232 views
Purpose of building footprints
What are the uses (public and private industry) of building footprints?
I'm trying to figure out how polygon building footprints can be used. i.e. are they used for determining tax liabilities, ...
