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

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Mapbox Satellite - Digitizing

As a part of project scope we have to deliver to the Client digitized data sets – some houses and roads. Can we use Mapbox Satellite global imagery layer [1] under Professional plan [2] for feature ...
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Global Imagery Services for commercial digitizing? [on hold]

Could you please suggest a Imagery Services for commercial digitizing? I look for "MapBox Satellite-like Service" [1] but with a clear plan for use in desktop GIS (for digitizing) and with simple ...
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32 views

Primary and secondary data

If I am creating data from satellite imagery, is this classed as primary or secondary data? If I am creating slope data from a DTM, is this then classed as primary or secondary data?
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37 views

gdal2tiles georeferenced image as overlay not working

Ive been looking for a solution to my problem for some time now. I'm using gdal2tiles-leaflet to create tiles for my Leaflet application. The images i use are GeoTiff's with the embedded projection ...
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23 views

0.5m resolution up-to-date images for Iraq

I use TerraServer for general keeping up to date on infrastructure projects. TS, however, don't exactly offer the latest images - some are 12 months old, some even older. A small saving grace is that ...
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6 views

google maps engine connector

I am trying to use google imagery in QGIS through the Google maps engine connector plugin. I relatively new to QGIS and need some help. What I want to do i use the google maps in QGIS and then print ...
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27 views

How to create grid from 2 separate images of latitude and longitude

I have two separate images of latitude and longitude, and want to create a grid from them so I can assign it to my Non-Geo referenced file... How can I create it, particularly in Matlab... But other ...
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74 views

Why does the peak of a mountain appear bright on Radar images

Why does the top of a mountain appear bright on a SAR (radar) image. I know that the peak of a mountain is subject to a layover effect, thus appearing closer on the radar image than the bottom part of ...
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29 views

Saving a TIFF file with band names

Does anyone know if it's possible to add a TIFFTAG when saving a tiff file (I'm using the C/libtiff interface) that will give a name to each band? Some kind of per-band TIFFTAG_IMAGEDESCRIPTION is ...
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42 views

How to align hundreds of rasters quickly

I'm hoping to accurately align hundreds of aerial images that are slightly off-kilter. The images cover the same area on different dates (several acres). They contain identifiable features around ...
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67 views

Does anyone know a way to do a supervised classification on a google maps image to show only hedgerows?

I would like to then use the hedgerows by bringing it into QGIS as a layer. I need to know what software to use and the method to make such a layer? I would like to use a google earth image in Grass ...
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44 views

How do I convince gdal2tiles to output pngs with transparency?

I have a tiff that was created with Pix4dmapper. This tiff has coordinates embedded (as seen in the logs below) (I think that makes it a geotiff?) as well as a tfw file associated with it. Opening ...
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52 views

QGIS: raster image georeference and overlay

I've created a grid and points in QGIS which I used to survey. Using a test image at the moment and I'm trying to fit this image as an overlay within a boundary. When I insert the image it has a white ...
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27 views

comparison of atmopsheric correction methods

I have noticed that dos methods for atmospheric corrections are in the section of radiometric correction (i.toar) on grass gis.Does that means that dos is a method doing radiometric and atmospheric ...
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1answer
70 views

How to calculate raster statistics for each band in qgis

i need to calculate raster statistics for RGBN (4 channels, multiband image) rasters in QGIS. In Arcgis if you use "calculate statistics" in Arcatalog, statistics are calculated for every image band. ...
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19 views

image files and metadata

When writing metadata for .img files stored on disk, as opposed to a raster catalog, raster field names are shortened to 10 characters, because the vat.dbf file is created and read (by arc catalog ...
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28 views

I am looking for Thermal IR Photography with 1 m resolution?

I am looking for thermal IR photography with 1m resolution? It needs to be recent or maybe a company in western Canada that can fly a mission like this. Satellite or flown photos both work, I am just ...
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30 views

remove black margin of georeferenced image before overlay to google maps

i used envi to georeference satellite imagery. then I tried to overlay that geo image to google map. all fines BUT the black margin appears on the map. is there any way to git rid of that black ...
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173 views

Which remote sensing satellite is best used for chlorophyll mapping?

Location of my research are reservoirs which have an area of 47 and 62 km2. I need a better image resolution than Landsat(Pan).
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138 views

Good GPS navigation app for iPhone with downloadable OFFLINE maps?

I am looking for a good GPS navigation app for my iPhone that will work away from wifi and cell coverage (GPS only) and thus allow me to download offline maps. Paid app is OK. Must Have features: ...
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60 views

Satellite Images for the Mediterranean Sea Oil Spill

I am looking to obtain free satellite images to detect oil spills in the Mediterranean sea. What sensors would be most appropriate for this task and where can I download this type of data?
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3answers
55 views

Saving extent of satellite imagery in ArcGIS Desktop?

I'm using 50cm imagery for the whole country of South Africa, which make zooming and panning painfully slow. Can I save imagery for just the area I am working with (ie. data frame, city, province)? ...
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102 views

Free download NDVI images or raw satellite images

Could anyone provide a site to download NDVI images or raw satellite images of Sri Lank (Asia)for free for me to calculate the NDVI.
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How do I use Multispec for Landsat data?

It seems that I only can use the Clustering if I want to cluster only one band data.. If I open up more than 1 band (in one image), the cluster toolbar is disabled? optional: Is there any free ...
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55 views

How can I export ESRI World Imagery from the “World Imagery (for Export)” map service? [duplicate]

How can I export ESRI World Imagery using ESRI's World Imagery (for Export) map service?
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24 views

Band values after TOA reflectance calibration of WV-2 exceed 1

I use custom python-GDAL script to calibrate WV-2 scenes to TOA reflectance accordingly to 'Radiometric_Use_of_WorldView-2_Imagery'. Here you are a histogram example with the pixel values of the ...
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131 views

Where to download 4-band NAIP imagery for California?

I've been trying to find orthoimages with 4 bands for a couple of counties in California. I managed to download some from the GeoSpatial Data Gateway from the USDA (NRCS), but they all only have 3 ...
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88 views

ESRI World Imagery (for Export)

I would like to download some of the ESRI World Imagery using this however when I try to add the layer to an online map I get "The layer, World Imagery (for Export), cannot be added to the map". I've ...
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44 views

Georeferencing in R Based on the Four Corners

I have a raster image (photograph) that was taken from a helicopter. Along with that raster image, the system also tells me the positions of the four corners of the image in a different file. I have ...
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92 views

read tiff to bmp in c# got only white image

i want to convert a tif image to bmp i was following tutorial in https://trac.osgeo.org/gdal/wiki/GdalOgrCsharpRaster but i dont get an image i want to see the code is : // Creating a Bitmap to ...
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68 views

Satellite imagery alternatives for land use/cover classifcation

Apart from Landsat imagery, which other satellite imagery is good for land use / cover studies and can be obtained free of charge?
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47 views

ArcGIS Server Image Service from Mosaic Layer

I have successfully created an image service from a mosaic dataset using NAIP imagery. I would like to create another image service that displays the same area in NIR (4,3,2). I have created a mosaic ...
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108 views

Stacking Band ratio on Landsat 8?

I have a question about Landsat 8 I am going to work on... I am thinking about stacking all the bands however there are 15 m, 30m, and 100m Do you stack all together ? This is to give the end-user ...
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Limiting Imagery to a Certain Area

I have a layer that shows some imagery in Ontario. I would like to get rid of the imagery that I don't need, because I only need it to be in 6 squares that I have. Is there a way to restrict the ...
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How to serve an image layer with tilestache

I have some .png images with associated .wld and .tfw files. I'd like to display this in OpenLayers, and I already have a Tilestache server running, so it would be good to leverage this. OpenLayers ...
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Why did my footprints build failed?

As I am trying to add raster to my mosaic dataset and were able to see them and now all of my raster are not showing. Why did it could not build a footprints ? I have tried everthing to get them ...
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43 views

White box problem

As I am trying to work on getting this problem done , I am using Mosaic Dataset for the whole state of New Mexico using our NAIP ...now the problem is that I could not get rid of the white "box". I ...
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Mosaic dataset gives me some blocks

as I am trying to mosaic NAIP into mosaic dataset and ended up like this with the block. How do I remove the blocks ? Does anybody have a suggest for me to fix them ? I am using ArcGIS 10.1 SP 3 ...
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28 views

Night - lights for social welfare

I want to to find the social welfare and the population density for Europe and Africa with night-lights. Is there any site where I can find images with good resolution (I only think VIIRS)??? I have ...
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22 views

Old World View Map / Tiles

I m currently looking for Imagery of Old World View Map, maybe 19th century, black white is okay. And if there is tiles services that would be cool. Is there any site that still contains those ...
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How much does relatively up-to-date 1 meter resolution color satellite imagery cost?

I'm starting to realize that I'll probably have to pay for good satellite imagery, and the sites I've been to so far want me to call them to ask for price quotes. I'm wary of this and haven't done it ...
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21 views

Building simple offline map application using Python? [duplicate]

I need to build a simple offline map application using python, which will need some plotting and overlays, using some form of a satellite imagery. I need some help getting off the ground. what ...
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Satellite data between 1975-1985 in Brazil?

So I've been looking for satellite imagery to use for a project without any luck. I need images between 1975 and 1985 near the Roosevelt river in Brazil, from any satellite at any spatial/spectral ...
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66 views

Image classification from “Imagery” basemap ArcGIS 10.2

I'm trying to reclassify the coast of France and Spain into rocky or sandy categories. So far, I've been drawing polygons around the different patches, but want to try using image classification to ...
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49 views

Where to download rasters for QGIS 2.6

Where can I download sat imagery. I've read that openlayer provide such things but it requires an internet connexion, and I mostly use Qgis with an offline computer. So do you know a way/provider (for ...
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137 views

Inserting JPEG or similar into ArcGIS map?

I am trying to upload an image (jpeg or similar) into a map. It can be on the layout view or data view. I am using ArcMap 10.1.
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2answers
42 views

MODIS product MCD43A3 stating 16 periodicity but when downloadad I have files every 8 days

I'm downloading the MODIS derived Albedo 16-Day L3 Global 500 m resolution product. I expected to have a dataset for dates every 16 days. Instead I have datasets every 8 days as can be seen in the ...
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38 views

Black polygon covering aerial imagery in QGIS?

I am using FSA 2013 aerial imagery, which I access via WMS in QGIS. In some locations the imagery is covered by a black polygon. The polygon only displays at certain scales. Then, if I zoom out until ...
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53 views

Satellites to retrieve UV bands

I want to retrieve some satellite images with UV bands,Bun I don't know which satellites are providing UV bands and We can freely download them? I have already downloaded Modis and Landsat images,But ...
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31 views

How to load two images in ENVI 5.1?

I am using ENVI 5.1 and when I use the Data Manager to load several images and if I want to load two adjacent images, why would one of them load and the other doesn't?. Am I missing something here ?