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

learn more… | top users | synonyms

1
vote
1answer
7 views

Adding NASA WELD Imagery to ArcMap?

How I would add WELD satellite imagery from NASA into ArcMap? I'd like to take the entire CONUS scan and place it into ArcMap. I tested a smaller scan of the Northeast, however I got a plethora of ...
2
votes
0answers
31 views

Publicly accessible (near) real-time satellite imagery

The operators of the Himawari-8 weather satellite provide a fresh full-disc picture of Earth every 10 minutes. This is a great resource and powers applications such as RealEarth. Are there any other ...
0
votes
0answers
25 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 ...
0
votes
0answers
31 views

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, ...
2
votes
1answer
47 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). ...
1
vote
1answer
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 ...
0
votes
1answer
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
0
votes
0answers
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 ...
2
votes
1answer
41 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 ...
2
votes
2answers
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 ...
0
votes
0answers
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 ...
0
votes
2answers
76 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 ...
0
votes
0answers
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 ...
1
vote
0answers
17 views

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 ...
1
vote
0answers
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 ...
1
vote
1answer
107 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 ...
1
vote
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 ...
1
vote
0answers
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?
0
votes
2answers
101 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 ...
4
votes
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 ...
1
vote
0answers
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 ...
0
votes
1answer
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 ...
0
votes
0answers
10 views

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 ...
0
votes
0answers
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 ...
3
votes
0answers
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 ...
0
votes
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 ...
1
vote
1answer
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: ...
4
votes
0answers
104 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, ...
0
votes
0answers
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 ...
2
votes
1answer
186 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 ...
1
vote
1answer
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 ...
1
vote
1answer
52 views

Problem with low quality tif

I have the problem with low quality raster. Now it looks like this: I would like to change this to looks like this: Im using ArcGIS, ArcScan. After some work with photoshop and reclassify with ...
1
vote
1answer
231 views

Difference between spatial and geometric resolution

Wikipedia quotes Campbell 2002 as saying: Spatial resolution is defined as the pixel size of an image representing the size of the surface area (i.e. m2) being measured on the ground, determined by ...
1
vote
1answer
172 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 ...
3
votes
0answers
39 views

Why does my Validation Script continue to run when adding the result to the map?

I am in the process of developing a python script that creates a list available imagery for our project areas that would then allow the user to choose which imagery source they would like to add to a ...
2
votes
0answers
77 views

How to interpolate values for NaN pixels using ENVI?

I'm currently using MODIS data and am running into problems with NaN values in the final product caused by clouds. I'm interesting in a simple way to spatially interpolate (fill in) these NaN values. ...
4
votes
0answers
82 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 ...
0
votes
1answer
59 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 ...
0
votes
0answers
36 views

Georeferencing two images at the same time in QGIS

Has anyone ever tried to georeference two images at the same time on QGIS? In my application I don't atually care much about the positioning itself, but in the scale and orientation. Why? I have ...
2
votes
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 ? ...
1
vote
1answer
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 ...
0
votes
0answers
20 views

Loading 4 band imagery in QGIS

I am loading 4 band imagery into QGIS 2.8.1 for Windows and am having a visual issue. The image looks blown out (see attached), which made me suspect that this was an issue with the 4th (alpha) band. ...
3
votes
1answer
126 views

Is there any free or open offline satellite/aerial imagery for commercial use?

I'm developing a product for offline use in Brazil in rural areas where there is no Internet connection. I'm searching for a free imagery source which can be used offline in a commercial product. ...
1
vote
1answer
52 views

How to use OpenLayers to display an image only?

I have a high resolution image, which I've broken down into tiles and named the tiles according to x,y co-ordinates and zoom levels. The image is not projected in any geospatial/gis (WGS84 ellipsoid, ...
0
votes
0answers
58 views

High Resolution Imagery in the public domain

Needed a online high resolution imagery for USA free to be used anyone for personal and commercial* purposes. RGB 2012-2015 Whole country coverage 0,5-2 meters per pixel WMS or TMS Any ...
2
votes
1answer
61 views

NASA world view (EOSDIS) coverage delay per day - scanning footprint issue?

I noticed that in NASA world view web site it's take some time to get per day world wide coverage. I made some calculations: The source is Aqua & Terra satellites Both have orbital period ...
3
votes
1answer
75 views

Why NASA world view (EOSDIS) have black strips?

There is the famous NASA World View site based on EOSDIS. I relatively new to this and I wonder why & what are those black strips on the existing coverage? I also notice that the position of the ...
4
votes
1answer
636 views

comparison of Historical aerial photographs to today's satellite images

I'm working on a project in which I have to compare vegetation cover changes. So we have 1950's aerial photographs which must be compared to actual satellite images. Images must be properly adapted ...
1
vote
0answers
31 views

Loss of Quality in UAV Imagery after building pyramids in ArcMap?

I am using arcgis 10.1 to plot and print maps with a background with UAV imagery. When I insert an image (Tiff format), it loses quality. The program prompts me to create pyramids, once this is ...
1
vote
0answers
77 views

TIF not showing UTM coordinates in world file

I have a lot of tif files (ortho imagery that came with Lidar data). Each tile has a .tif and .tfw but the world files (.tfw) have line 5 and 6 as numbers that aren't what I would expect as I was ...