Imagery refers to raster based datasets acquired from sensors on satellites or aircraft.
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159 views
Medium resolution imagery for the US?
For my web map application http://ian01.geog.psu.edu/geoserver/www/pa/pa3.html I have three levels of background imagery as the user zooms in. At small scales I'm using NASA Blue Marble and a large ...
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2answers
2k views
Where can i download a good World image in GeoTIFF?
I can either be from MERIS (ESA) or from MODIS (Nasa). I already reached these sites:
http://www.unearthedoutdoors.net/global_data/true_marble/download
...
2
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2answers
220 views
Convert Georeferenced imagery to vector data using python
Are there any opensource tools I could use to take a projected georeferenced image such as a jpg with world file, that is UTM projection such as NAD83 and convert it into distinct vector polygons ...
2
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1answer
127 views
Trouble viewing MrSID in ArcView 3.3
I have been using 3.3 for some time and now I have Arcmap10 on the same computer. My problem is that I cannot pull up the Mr Sid files. 3.3 can't find them ,the id has the right info but no image of ...
2
votes
1answer
340 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 ...
2
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3answers
296 views
Combine aerial imagery pictures to create a layer
We are looking for software or a web service that we can put in pictures we took using our weather balloon to create a single image, that we can use as a layer for our GIS project. Preferably free, or ...
2
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2answers
74 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 ...
2
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0answers
126 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
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3answers
352 views
Looking for high resolution (1m or better) aerials for Turkey
Would prefer free but under a couple hundred dollars is also doable.
It would be nice to have actual tif, sid, etc. files but a WMS would also work... using ArcGIS 10
Would also consider any of the ...
2
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0answers
71 views
Are there any naming conventions for aerial imagery?
Do GIS projects involving high resolution NAIP quarter quad imagery typically use the USGSID code and qq (e.g. 3910232ne) or the GNIS code and qq (e.g. 39102e1ne) to organize data? I can't seem to ...
2
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0answers
589 views
Clipping MrSID files
Does anyone have experience subsetting/clipping a large NAIP imagery file in MrSID format? Some of the NAIP files we have are by county and they have really large file sizes.
The files are from the ...
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3answers
225 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 ...
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2answers
309 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 ...
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2answers
731 views
How to convert GeoTIFF to grayscale and add gaussian blur?
I have a giant GeoTIFF I'd like to convert to grayscale and add a gaussian blur to. As far as I know, GDAL can strip two of the three color bands and call it grayscale, which might work, but is there ...
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2answers
454 views
Where can I find non-rectified stereo satellite imagery?
I'm looking for free (as in beer and as in commercial-use-friendly freedom) sources of stereo satellite imagery. I assume that such imagery should not be rectified since that would remove the benefits ...
1
vote
1answer
125 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?
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1answer
198 views
GDAL Brightness RGB Contrast Gamma Saturation
I've not had much experience with modifying imagery, I've recently been playing with GDAL for some batch processing of geo-referenced images, I've been supplied with some imagery in ECW format that is ...
1
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1answer
69 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 ...
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2answers
68 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
1answer
41 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?
1
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1answer
93 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 ...
1
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0answers
123 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 ...
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0answers
170 views
Assign Custom Band Combination To Image Catalogs In ArcGIS
I have an image catalog composed of 4 band rasters. I would like to use the same image catalog, and set custom renderers for a true color and false color combination and save each of those catalogs ...
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0answers
226 views
Recomputing footprints on old satellite imagery
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 ...
0
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1answer
200 views
Incorrect spatial extent for imported hdf image on ArcGIS
I imported an hdf image onto ArcGIS but I cannot make correct projection of it. Also, it does not have correct spatial extent (please see the enclosed figure, the small one is projected under WGS84). ...
0
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1answer
386 views
Is there a way to save images with none stretching in ArcGIS
I have some satellite images, when I imported these in ArcGIS and went to properties and then symbology tab, I saw stretch type was set to standard deviation. I want to save these images with no ...
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0answers
20 views
Can't open ArcGrid created by Seamless viewer from NED
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 ...
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0answers
35 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 ...
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0answers
53 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 ...
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0answers
85 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 ...
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0answers
88 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 ...
