Imagery refers to raster based datasets acquired from sensors on satellites or aircraft.

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Suggestions on Imagery type for ArcGIS for Server (Without Image Extension)

I am exploring the best options to serving raster imagery on ArcGIS for server 10.2.2. As a background, I currently have roughly 200 .jp2 files of about 3mb each. All of these files are currently ...
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379 views

50cm imagery - aerial or satellite?

The area of interest is 1450 km2. My options are: 50cm newly collected aerial natural color imagery for $28,300 OR 50cm recent archival satellite imagery (includes near IR band) for $20,600 The ...
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50 views

Colour matching satellite imagery from different time periods

Is it possible to colour match two separate satellite images taken at two different times? I am working with two high resolution, multispectral images that were taken approximately one year apart and ...
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82 views

Satellite imagery options for small/medium sized countries?

I need to create land cover classifications for a couple countries in central/eastern Asia. The largest country is 50,000km^2 and the smallest is 10,000km^2. What are my options for recent imagery? At ...
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295 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 ...
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105 views

Is it possible to highlight water steam sources on Landsat 7 image?

I am trying whether it is possible to view hot steam sources like power plant cooling towers and resulting cloud using satellite images. I was advised to try Landsat (needed free data for initial ...
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Creating custom size images from WMS cache

I am currently working on my own WMS service (using PHP). The service works currently if the requested image is in 256x256px size but currently does not support any other size. My service basically ...
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187 views

Projection to use with satellite image from Google Maps / Earth

I'm very new to anything concerning GIS so please forgive me if this question has been asked before, but I assure you, I've been trying to find an answer for quite some time now. Of course it is ...
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93 views

Counting animals using near infrared imagery from a drone [closed]

I am playing around with an idea of using a near infrared camera to fly transects to count animals on the ground. I have been involved in such work earlier, but on bigger mammals and observer based ...
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173 views

How to modify 2 raster images to have the same resolution?

I have data for 2 rasters images that have different resolutions: z downloaded from trmm An MSAVI2 output image. For calculating the correlation between them, the data has to be in the same ...
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Custom imagery not converted correctly in web Bing format tile with Global Mapper?

I have Custom image and I converted to that to the web bing format tiles with the help of global mapper but that are not produce correct quad key in each tile. On the bing map quad key is starte like ...
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54 views

how to mosaic rasters in grass gis?

I am new user of GRASS GIS. I need to know how can i mosaic different satellite imageries using GRASS GUI? I was trying to use i.image.mosaic, but could not succeed. I have been looking for online ...
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53 views

python crop aerial image

How can i crop an area from an aerial image knowing the latitude and longitude of the image's corners and also the cropped section? I have a LiDAR scan and i and want to crop an image overlay to fit ...
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24 views

.ecw versus.ers

I have two (seemingly identical) historic Aerial photos of my county of interest. One has a .ecw file extension and one has a .ers extension. I've been using the .ecw without trouble, but wanted to ...
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2answers
117 views

Memory and Processing Efficient Approach to Read a Timeseries in Python

I am trying to store a timeseries of high resolution raster images containing NDVI values into a dictionary for calculations. I am curious as to which approach may the most efficient when loading ...
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45 views

Looking for gis server for pictometry that can do bing-like “birds eye” tilted view and rotation

I need an open source gis server that can present these pictometry images, I guess they are also called 2.5D. The camera on a plane takes 5 shots, one orthogonal, other 4 in all directions. North, ...
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42 views

Alternatives to ArcGIS Image Server Extension to serve Mosaic Dataset?

I am wondering if anyone has any resources for alternatives to ESRI's ArcGIS Image Extension for Server? We are looking to serve JP2000 images that have been consolidated using the Mosaic Dataset ...
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15 views

How to Properly Share as Image Service?

I have 5 historical aerial sets for my county each consisting of several hundred SID files. Previous employees have created Image Catalogs for each. Now I want to turn these into services I can share ...
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74 views

Download MODIS data for Mexico

I would like to download MODIS npp images for Mexico but I cannot figure out which files correspond to the country. How can I associate each tile to its location without looking at the million of ...
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252 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 ...
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5answers
183 views

Where can I get high-resolution (at least 1 foot) imagery of California?

Is there a national site or state site that will allow me to download High Res (1') aerial imagery of California? I have tried Cal-Atlas Download but they are at one meter. I have also tried USGS ...
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3answers
790 views

Is there a programmatic way to retrieve Landsat 8 Satellite Images?

I have not been able to find out this myself, but is there a way to programmatic access Landsat 8 Satellite Images? I know that I can go to USGS EarthExplorer to search and browse through the scenes, ...
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4answers
3k views

How to redefine the nodata value into zero 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 ...
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ESRI Basemaps - World Imagery: Is it possible to bring certain imagery into foreground (change the viewing order)?

I have a basemap loaded in a map in which there are 4 overlapping images. I would like to either turn off 3 of the 4 images or bring the one i want (marked with X n the screen capture) into the ...
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27 views

Unable to get processing extent to match desired raster output

I have a few thousand ortho mosaic tiles that I've resampled to a lower GSD and am trying to cut into larger tiles. I developed a script that has worked perfectly for thousands and thousands of tiles ...
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Open Layer Plugin Images Informations

I'd like to know how to find informations about Open Layer Plugin Images. I need to know the date and resolution of the images. Thank you!
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895 views

Is there a way to export online ESRI basemap layers to raster?

I have been working on polygonizing the vegetation areas in some counties from imagery. When I have the mosaic raster locally I can easily get the polygons using Image Classification Toolbar. But when ...
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83 views

Parsing metadata text files with Python

I am trying to use python to parse the .pvl metadata file from some GeoEye imagery. I would like to write a script that locates the productCloudCover and countryCode tags found within the .pvl. Does ...
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133 views

How to download GeoTIFF files of TRMM product 3B42 (rainfall estimates) [closed]

I want to download GeoTIFF files of TRMM product 3B42. (This is a rainfall estimate derived from multiple sensors of the Tropical Rainfall Measuring Mission satellite.) The NASA/Goddard Precipitation ...
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388 views

What lens and camera settings are recomended for UAV (drone) aerial imagery capture? [closed]

I have been toying with the idea of purchasing/bowrrowing a UAV and attempting to capture my own aerial imagery. I have pretty good DSLR Canon gear and several lenses but I am wondering what lens, ...
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4answers
104 views

Looking for simple software to compare two Landsat Images

At uni I used ERDAS imagine to view two rasters at the same time and it had various viewers for comparing them. I'm looking for something that has a slider so that I can see the differences between ...
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105 views

Gdal creating raster rotated wrong way

I have been trying to read in a stack of images for a timeseries and created an output raster that contains the max pixel values of the timeseries. The arrays were created using numpy img_stack = ...
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49 views

How to perform image classification with SemiAutomaticClassificationPlugin and BIP files?

I have multiband satellite images BIP format, Landsat TM/ETM containing 7/8 bands respectively along with a separate header file, some of them corrected by nearest neighbour classifier. I'm working ...
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109 views

How can I flatten a multi-band raster to a single-band raster in ArcMap 10.2?

I need to convert a multi-band PNG image into a single-band raster, for analysis and visualisation. How can I do this in ArcGIS 10.2?
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59 views

From where I can get 4-band satellite imagery of Sweden?

I'm looking for good quality, fine resolution 4-band satellite photos of Sweden for academic use (and I'm willing to pay for it). What I'm after is as detailed as possible photos of certain part of ...
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46 views

How can I add aerial imagery using REST services as a basemap in CartoDB?

I want to add my county's aerial imagery as a basemap in CartoDB, same as I use in OSM's iD editor but it is not loading. I am adding in the XYZ url as this: ...
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213 views

TRMM data download

I need help in downloading 7 day composite TRMM data (Geo-Tiff) like this for past 10 yrs of the SE ASIA region. It is way too confusing where to obtain the data, I wanted to analyze the precipitation ...
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Imagery on March 6, 2014 @ Lat 42dd55'22“ N, Long 079dd37'36” W

I am looking for any advice where to find imagery on March 6, 2014 (or a few days following) for: I have searched the USGS, ImageHunter, and Digital Globe with no luck. Does anyone have a resource ...
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99 views

Where can I find GIS data about NYC's combined sewers (CSO) that's free to use?

I've located two sites that display the data that I'm looking for, but both lack exporting functions. OASIS NYC and maps.nyc/gov Otherwise I can't locate this data anywhere in a format I can use in ...
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107 views

Load MrSID file in QGIS 2.2 on Ubuntu 13.10

Is there a way to do this? I have tried a number of the write ups on this, and it appears that libgdal-mrsid-src no longer exists. Is there any other workaround? USDA NAIP imagery is sent as MrSID. ...
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2answers
115 views

Geographically georeference image with limited information

It is possible to semi-accurately georeference an image given only the following information? I'd like to do this programmatically. Center point of terrain, Lat/Lng (WGS84) Pitch of camera FOV ...
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43 views

How to use the Cartographic Composer of GRASS 6.4.3?

Following on from my previous question (which was, again, how to use the Cartographic Composer)... I've got a GIS in GRASS. I need to print various bits of it. Problem is, it needs images on it ...
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120 views

What are people using for Site Location Maps without Bing?

The introduction of Bing Imagery with the release of ArcGIS 10.0 provided a fantastic means to very quickly produce Site Location Maps. Prior to its' introduction, I was using a GIS server connection ...
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170 views

Mosaic Dataset would not show raster unless you zoom in further to around 1:2,500 scale?

So when I make a copy the Mosaic Dataset File GeoDatabase to my external hard drive and then copy it to my computer. It would show the checkerboard at the full extent but when you zoom in it would ...
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2answers
59 views

How to produce maps with copyright imagery on it in GRASS?

I'm having some trouble with a GIS that I've got to produce. I work for a contractor and we'll have to produce maps to do the work for our client. The client has specified that if we print maps out ...
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191 views

Efficient way to store multiple values of an x,y location in Python?

I am trying to read values from a stack of images and store them in a structure that will allow for easy readability. My current idea is to create a loop for x in width: for y in length: ...
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259 views

Novel ways of filling in missing values in a raster

I am looking for robust ways to fill in missing values in some rasters. They all have a single layer. Missing values consist of single pixels to medium sized patches. Rasters are around 1000 x 1000 ...
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251 views

Possible to Clip Imagery Services Layers from ArcGIS Online?

The new Landscape layers such as the various Soil type imagery services look like a great resource. Does anyone know if it possible to clip out small areas of the Landscape imagery service since I ...
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323 views

Which is the best way to create a polygon with the extents of a raster file in QGIS?

I have a tiff image file and want to get a polygon with the extent of the tiff. Is there a direct way of doing this? Right now i have to convert the image to vector (with gdal_polygonize) and then ...
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252 views

What does MODIS data reflectance values (MOD13Q1) mean?

Several publications suggest filtering MODIS data (in my case MOD13Q1) prior to use. They recommended to filter out pixels having blue reflectance more than 10%, but what 10% here means? is it 10% of ...