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

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How to match 2 different rasters?

1st rasters: Satellite image that represents NDVI value [Cell size (5,5) OR resolution :5 meter. Number of rows and columns: 5000, 5000] 2nd rasters: DEM represents heights [cell size (9.0106388, ...
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24 views

Options for Bulk Download of Satellite Imagery

I am looking for some sources of Satellite imagery that I can bulk-download for offline use with mobile apps. I am willing to pay, but so far I am not finding any good solutions out there. Something ...
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171 views

Adding Esri imagery to QGIS using “services.argisonline.com”

I'm trying to add this particular imagery in QGIS: http://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/3 But when i write the phyton srcipt i get the message that the URL ...
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1answer
49 views

Old imagery WMTS

I am looking for a web imagery tile service that provides old imagery, in the same vein as Google Earth's old imagery, but one that could be integrated into an OpenLayer or Leaflet map. Any idea ? ...
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2answers
116 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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46 views

Aerial picture - how can I extract water drainages on a crop (to vectorize them)

I have a RGB aerial picture of an agricultural crop. The drainages (hundreds of them) can be barely seen because they a very slightly greener then the surrounding crop area (picture is from April). ...
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23 views

Spatial Resolution (Scanning Precision)

I am using Landsat_7 image and details is pasted below: - Date of acquisition: January 2001 -Pixel size: 25 m -Spectral bands:  Band 1: Blue 0.45-0.52 µm  Band 2: Green 0.52-0.61 µm  Band 3: Red ...
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42 views

Building georeferenced GeoTIFF from mbtiles automatically?

I want a georeferenced raster.In that way I don't have to georeference this raster manually . I know that geotiff has the georeference inside it , I got the mbtiles of the map how do I build the ...
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39 views

Imagery Band order for Natural and False color imagery

I have an image which has had its band ordering rearranged, giving it a weird false color. I wanted to change it back to a natural color, so I used GDAL and through trial and error got the bands ...
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2answers
94 views

Identifying individual pine trees without using LiDAR data?

Are there any ways to identify individual pine trees without the use of LiDAR data? Crown identification seems irrelevant. My goal is to do a rough treetop calculation to get an idea of how many ...
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20 views

ArcMap's base map with imagery collection date [duplicate]

How can I determine the collection date for ArcMap's base map with imagery? I'm using ArcMap 10.3.1
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29 views

Free satellite images for academic purposes [duplicate]

Since the Landsat mission opened it's archive a lot of great scientific studies have been produced in the field of Remote Sensing. The Sentinel imagery from ESA is also thought to be open access ones ...
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43 views

How to extract clear cut areas from dried trees in forests

I have 40 cm resolution aerial image with visible and near-infrared bands. Purpose is to extract dried trees in forest. I used multiresolution segmentation algorithm to extract individual trees and ...
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3answers
589 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? A short update concerning this attempt to ...
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1answer
131 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 ...
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1answer
379 views

Incorrect spatial extent for imported HDF image on ArcGIS Desktop?

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). ...
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1answer
158 views

Seeking imagery for Mexico?

I am doing Rapid Watershed Assessment for my agency and I am responsible for the Southern New Mexico and northwest Texas. I have 2 NAIP added to my ArcMap already and using it with the "Add Image ...
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2answers
75 views

How to save imagery from online raster service for offline use?

QGIS allows me to connect to free map services like ESRI's 'world imagery'. I would like to save a certain part of it (decided by map extent) in the highest zoom level available in the service for ...
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112 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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30 views

How to calculate Fiducial mark?

I'm working on a photogrammetric project. For the interior orientation, i have to calculate fiducial marks a,b,c and d thanks to my input information : distance in mm between AB, BC, CD...and also ...
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58 views

georeferenced JPEG images not intalling in QGIS correctly

I am trying do add georeferenced aerial images (jpg files) to my QGIS. They do not install properly. I either get a grey rectangle or bands of colour (mostly blue) that appear where the image should ...
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8k 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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Raster Imagery Performance

I'm currently building a project that will involve using raster imagery in the field on a Windows tablet with QGIS/Intramaps Roam and haven't been able to get a satisfactory understanding of a few ...
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30 views

Why the quality of image is changed as it is added to a mosaic

I have added an image to a mosaic dataset but I have noticed that the quality of the image has been changed automatically. How to keep the original quality of the image after adding it to the mosaic ...
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1answer
104 views

Looking for real-world DJI Phantom 3 Professional sample geo-tagged images for testing

I am looking for sample DJI Phantom 3 Professional imagery for testing purposes with the Drone2Map for ArcGIS Beta software. So far I am finding the application very polished and easy to use but I am ...
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3answers
45 views

What can I use to have aerial imaging delivered via slippy URL format

We have been given a license to aerial imaging from a local supplier. They are available in: * 1km x 1km tiles in MGA coordinates in both TIFF and ECW file format * Mosaiced blocks in MGA coordinates ...
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178 views

Converting satellite image into raster

I am (very) new to GIS in general. I would like to convert a satellite image of a province into raster, assigning each pixel its own data (i.e., a number and a name) based on its html color code. For ...
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41 views

Provider of hyperspectral imagery SWIR band

I'm looking for aerial hyperspectral imaging with SWIR band; size of ground pixel should not exceed 5m and dated not earlier as 2015. Could you propose provider such of data ? Area of interest is ...
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22 views

How to make LISS-III image coloured

In order to study land use and land cover change from LISS-III images I want to see the image coloured (i.e. false-colour composite RGB) using ENVI 5.0. What is the procedure?
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98 views

clip aerial map from Add Basemap Imagery

I wish to clip an aerial image from the "Imagery" of Add Basemap in Arcmap 10.3 and save as a sid file. How can I do that? Can someone help me please. Example, I am looking to clip only the state of ...
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54 views

salt marsh recession mapping with landsat/WV, IKONOS) [closed]

I am trying to detect timing and pattern of change in a particular salt marsh (low marsh sitting close to a high marsh). Basically, I'm interested in detecting changes in the leading edge for ...
4
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2answers
200 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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Mosaic georef is a few pixels off for half of my image, how to georeference?

I have two sat. images from the same platform on two different dates. The images overlap each other nicely, but I cant get them to accurately mosaic into one raster image. I merged the two photos ...
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306 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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15 views

How to avoid the quilt effect when displaying imagery from multiple source

In the context of creating my own imagery viewer (for educational purpose), I would like to learn about the process used to create seamless transitions between satellite imagery tiles coming from ...
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5answers
2k 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.
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73 views

Python script to automate saving satellite images for different combinations of lat longs

PS. : This is my first try at a GIS application. Please forgive if my question is pedantic. I would like to get a series of satellite images all at the same scale centered around different points on ...
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1answer
81 views

Where can I find SRTM DSMs (digital surface model)?

I'm interested in finding a 30 meter DSM (digital surface model that includes canopy) from SRTM with the hope of creating a 30 meter canopy height model. I know that it can be done because the ...
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103 views

Counting number of plants in area using images from UAV?

How do I count the number of pineapple plants in a 1-hectare block? I have heard of these algorithms but I don't know how to do it. I'm still a newbie of QGIS, ArcGIS and ENVI. I have the NIR, RGB, ...
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2answers
186 views

What exactly is 'anti-aliased image generation'?

What exactly is 'anti-aliased image generation'? I tried to google it, but didn't quite get it.
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67 views

How to determine the bands from an aerial image?

I received a set of aerial images taken with a Canon camera, I don´t know which kind of lens it has, or if it has been modified. After performing split image algorithm in Qgis, I get four new files: ...
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1answer
282 views

Counting animals using near infrared imagery from a drone

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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65 views

Digitizing scale when digitizing from Bing imagery service in QGIS

I need to digitize a bunch of islands from imagery in QGIS. It is the Bing Maps aerial imagery layer. I will obtain all required permissions. My plan is to lock the map scale at 1:25,000 and use heads ...
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2answers
170 views

Avoiding purple anomaly on imagery in ArcMap?

What is this purple anomaly on the imagery that we just received? The only thing I have done processing wise is to build the pyramids when they first came into ArcMap. Other than that, I have not ...
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0answers
81 views

How to use GDAL Correlator?

I need to align several images using FOSS. There is Correlator tool in GDAL (source) that seems to be suitable for the job. But I was unable to find documentation for it or a tutorial. Can someone ...
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1answer
58 views

Importing World Map image, color issues?

I am having a hard time finding a world relief map with "lighter" ocean colors that will actually display as such in Arc. This is the image I download from the web but this is how it displays in ...
2
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1answer
184 views

Geting Bing imagery to fully load in QGIS?

I'm using qgis 2.8 and by using the Open Layers plugin, I can access Bing aerial imagery. When I try to load it about half the tiles are missing. How can I get it to fully load so that my map is ...
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1answer
251 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 ...
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1answer
901 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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50 views

Georeferencing DWG files on imagery which is hard to see through (e.g. trees)?

Here I have a few campgrouds that I have for are in DWG files that I am going to georeference them. I have no problem with that however; some of these campgrounds I need to georeference on the imagery ...