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Questions tagged [imagery]

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

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Can't open WMS that worked before

I've been trying to access a several WMS servers in order to visualize imagery on my QGIS but when I put the URL on the searcher no results are given, as if there were no WMS server with such URL . I'...
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Seeking code for river extraction from satellite images? [closed]

I am pursuing M.Tech and my research topic is River water pollution analysis using satellite images. My initial step is river water extraction from satellite images. How can we extract river from ...
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53 views

How to visualize multiband imagery using rasterio?

How do I plot a satellite image using rasterio? I'm able to plot the individual bands but not the entire image. Is there a way to combine the separate R, G, B numpy arrays to create a standard RGB ...
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1answer
104 views

Adding Here WeGo Satellite imagery to QGIS?

Here WeGo has more updated imagery for Cambodia than Google. I would like to add the WeGo image tile to QGIS. I have followed the instructions here and can add the WeGo street layers to my map of ...
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42 views

Imagery looks distorted in ArcMap?

I have an image in NAD_1983_10TM_AEP_Resource in ECW format that I want to display in WGS_1984_Web_Mercator_Auxiliary_Sphere. When I add my image into ArcMap and apply the correct geographic ...
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Are there absolute minimum or maximum values for Sentinel-1 GRD images?

Sentinel satellite imagery has become a standard product for operational Earth observation. For the SAR case, this holds for Sentinel-1 ground-range-detected (GRD) imagery, in particular when terrain-...
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34 views

Exporting raster with map context using ArcPy?

I am a user of ArcGIS Pro. I am trying to convert a polygon shapefile into a raster dataset, then export a raster dataset to a PNG format via arcpy.RasterToOtherFormat_conversion. From .shp to .tif ...
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1answer
22 views

Focal length vs Principal point

I have set of areal imagery. One of a parameters I get with images is camera's Principal Distance , what I'm looking for is Focal length, but I don't have Focal length at the moment I tried to ...
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1answer
19 views

Creating ArcMap where two parts of different imagery basemaps are visible at once?

I am using ArcMap to create backgrounds for a book of poetry where the backgrounds of poems are satellite imagery. I would like to have a section of my map be from a BW image and another from a color ...
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1answer
20 views

ArcGIS 10.5 - Testing the accuracy of a satellite image's georeferencing using dGPS ground control points

I want to test the accuracy of the georeferencing of a satellite image by using a set of independent ground control points collected in the field via differential GPS. Is there a tool/method/...
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How much sidelap is adequate for aerial imagery?

How much sidelap is adequate for aerial imagery? My AOI has few buildings taller than 3 stories. I want to minimize building lean. I've seen imagery with 40% sidelap and the building lean is pretty ...
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76 views

Automatic digitization [closed]

I would like to know if it is possible to auto digitize a satellite image on ArcGIS 10.5. I need the building shapefile of a large remote area. I tried manual digitizing but its been stressful. I'm ...
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Download 3-month composite images from Planet.com?

I work in an area where cloud cover is probably the worst in the world. I have a free student account at planet.com and if I slide the cloud cover setting to less than 20%, then no images turn up in ...
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1answer
37 views

Are objects on periodically updated satellite imagery expected to shift and what to do about it? [closed]

Background 1: The organization I work at creates and maintains the road network of the entire country as line features, along with some points of interest. They do this by acquiring high resolution ...
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22 views

Why does ArcMap's Apparent Reflectance function call for Radiance Gain and Radiance Bias?

This documentation, as well as the function properties window, call for Radiance Gain and Bias to produce what ArcMap is calling "Apparent Reflectance" -- a term I am not otherwise familiar with. My ...
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46 views

Getting hazed figure when exporting a high resolution image in QGIS

I have a raster map made in QGIS. I am trying to export that map in .tiff format in high resolution (Somewhere around I can get a file of 300 MB). So I am exporting the image with a resolution of 960 ...
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1answer
28 views

Colorize radar imagery so it looks like optical imagery

Here is an imagery from a radar satellite Is it possible to colorize a radar image, so it looks like and enables the same kinds of analysis as for an image captured from an optical satellite (simple ...
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2answers
163 views

Strips/scratches on PlanetScope imagery

I'm doing a project that evaluates the practicality of using remote sensing imagery in agricultural field management. I noticed there are some scratches/strips on PlanetScope imagery for one of the ...
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1answer
189 views

Are there high resolution images available for download on earthexplorer?

The problem with earth explorer GeoTiff files is, if you zoom in enough, the resolution is very fuzzy. If you want to look at your backyard, for example, that is impossible. If you use the earth ...
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1answer
238 views

Downloading image/exporting image to google drive from google earth engine with color palette

When I download Analysis results from Google Earth Engine, the image is exported in to google drive but it does not have a color palette. How do i add color palette with the exported image using earth ...
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21 views

ArcMap Imagery Service Not Displaying Correctly

I am using a NAIP service to display aerial imagery. It appears as if only one tile is ever being pulled. I have played with mosaic properties of the service with no success. The tile changes every ...
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1answer
60 views

Purchasing NDVI imagery for South Western England? [closed]

I am working on a project developing an application for livestock farmers where they can monitor their feed using satellite data. The main aim is to calculate the biomass of a field of grass. The ...
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2answers
102 views

What does 4.5 mm resolution mean?

this is a rather simple and trivial question, but before I contact my supervisor I want to get sure. I have a .tif image that says the resolution is 4.5 x 4.5 mm. The output of gdalinfo is: Pixel Size ...
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1answer
71 views

Open Data Cube: How to write custom Prepare Scripts

How to write custom prepare scripts for Open Data Cube format ? The docs say the following: We expect that many new Data Cube instances will require custom prepare scripts to be written. It is ...
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1answer
114 views

Why does kmz with orthomosaic show white squares with red Xs when zooming in Google Earth Pro?

Every time in the morning when I first open my Google Earth Pro, Why does my kmz that has an orthomosaic show white squares with red X's when you zoom in? Here is a screenshot: I tried to clear out ...
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32 views

Geoserver Image Display Issues

We are attempting to display a .tif file of satellite imagery. We've taken some steps to prep the data that might be useful to know. First, my admin sees an error in geoserver logs that says, "...
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134 views

How to compare 2 NDVI images using python?

I want to compare NDVI of 2 images(TIF) of the same area of interest using python. My end result is to get the region on the image where NDVI is decreased(to depict crop damage). Problem: Images have ...
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ArcGIS imagery analysis difference raster errors

I have two DEM rasters from the USGS NED dataset. One is from 2013 and one is from 2017, the extents should, and appear to, be 100% identical. I ran the difference function on the ArcGIS Imagery ...
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72 views

Calculating albedo using NAIP imagery?

I am attempting to calculate albedo using NAIP imagery 4 bands (visible-NIR). Zhao et al 2015 used quick bird imagery to calculate albedo using the following equation: Albedo = -1.694(band1(blue))+2....
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27 views

Satellite image of a specific location at a specific time frame

I like to know where can i find a series of satellite images (day and night) of a location during a specific time frame?
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1answer
546 views

How to split multiband image into image tiles using Rasterio?

I have been using this answer on GIS SE to split 3-band (RGB) imagery into 256x256 3-band image tiles: import os, gdal in_path = '/path/to/indata/' input_filename = 'dtm_5.tif' out_path = '/path/to/...
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1answer
75 views

Increase contrast of merged Planet Labs scenes

I've download a few PlanetScope scenes from Celaya, MX. Taken alone they have a good contrast. Then I've merged them with gdalbuildvrt, which lowered the contrast: Link I've thought, that I could ...
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161 views

Seeking software similar to Google Earth Pro?

Are there other software products similar to Google Earth Pro? I am looking for a recommendation that: Can import an image to the software to overlay an exist imagery. Must have historical imagery ...
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1answer
71 views

Tree Cover Change analysis on QGIS, “Stripes” or “Banding” on the image

I am currently looking at Tree Cover Change around a set of 288 villages in the Equatorial Forest of Africa using QGIS. In order to do so I am using the GFCC30TC: Global Forest Cover Change (GFCC) ...
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Georeferencing in ArcGIS: from or to?

I am trying to georeference a newly acquired satellite image to a previously georeferenced image, i.e. match the newer raster to the older one with manually or automatically created control points. I'...
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1answer
459 views

Is Esri high resolution (0.3m) imagery service still available?

Neither the World Imagery basemap in ArcMap nor the service at ArcGIS Online provide high resolution (0.3m) images anymore. Has anybody been able to access the 0.3m resolution imagery recently? ...
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3D model of buildings based on satellite imagery

We would like to create 3D model of buildings of small area based on satellite imagery, including commercial. Could we achieve accuracy 1m or better based on these data ? I have found some articles ...
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1answer
34 views

How does MERIS collect vegetation height data?

In GlobCover 2005 and 2009 project, the sensor used for spectral data collection was MEdium Resolution Imaging Spectrometer (MERIS). It observes the Earth in 15 spectral bands in visible and near ...
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Clipped Imagery Larger File Size Than Input [closed]

I have jp2 imagery over a larger area. For our consultant to use this imagery, they require the file size to be smaller. To reduce the file size, I am using ArcMap to clip the imagery to only the area ...
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How to correct bad georeference data in a raster? [duplicate]

I'm doing a bit of vegetation mapping and I'm relatively new to GIS. My issue is that the aerial photographs I have are georeferenced with world files (.jpgw) but they are ever-so-slightly off. The ...
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2answers
424 views

How to download large subsets of USDA NAIP imagery from Box.com?

The US Department of Agriculture’s Geospatial Data Gateway states, ‘As of April 21, 2017 the NAIP datasets are only available through the "NAIP Download" option on the home page and are no longer be ...
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93 views

Upload Raster Data Google Earth Engine [duplicate]

I would like to upload in Google Earth Engine 150 images (.tif). I am trying to do it and I can upload 1 image but I cannot upload 20/50 or 150. I have this error: "Total area of overlap between ...
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0answers
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Bing shifted basemap imagery? [closed]

Background: Two years ago I used QGIS to digitize thousands of Alaskan stream segments using Bing imagery as the basemap, via the Quick Map Services plugin. The detailed Bing imagery allowed me to ...
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61 views

High resolution (house-level) tiled map imagery SAAS

I'm aiming at showing (on a web map) my visitors their house property bounds with some overlay. Thus, I'd need to find access to very high zoomed imagery, and I'd like to use Open Source and nice-...
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117 views

Changing raster display in QGIS to look same as ArcGIS Desktop?

I have a strange problem. I have noticed that the same satelite imagery looks totally different in QGIS and ArcGIS. The problem is that I need to get the same style in QGIS. I've tried to calculate ...
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4answers
724 views

Is there an online catalog for declassified Soviet Union Spy Satellite images (Zenit-4, Resurs-F1, Okean)?

I'm a glaciologist user of declassified US Spy satellite images (Corona Key Hole satelites, Hexagon, etc.), that provide an extraordinary record of glacier extent at resolutions equivalent to about 4 ...
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1answer
344 views

Open source remote sensing and satellite imagery DATA [closed]

What are the most known libraries of open source data related to remote sensing and satellite imagery? Especially applicated to agriculture? And what are their resolutions and frequencies?
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What does control points look like in viewer ? How spread do they need to be ?

I have a question for you . As I am working on using ERDAS Autosync to orthorectify from an ungeoreferenced aerial photos to known reference image. I have a DEM that to go with it as well. I ...
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1answer
172 views

How to make subset from satellite images without getting empty border?

I have Landsat 5-8 images, and after creating subset for the area of interest there is an empty border on the image as black part. How to remove it or how to create subset without it? Here is the view ...
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Are there any overhead thermal images of a data center in the public domain? [closed]

I wonder how realistic it is to map the server layout in data centers based on overhead images. A data center is a large warehouse containing thousands of computer servers, and I want to estimate the ...