Questions tagged [imagery]

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

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Download Google satellite imagery for the old year in SAS Planet

I want to download Google Maps imagery on SAS Planet but for 2015, is there a way to do it? Or is there an alternative way?
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Can't import data from ArcGIS Living Atlas [closed]

I'm trying to complete a lesson on learn ArcGIS. The lesson is titled "Model landslide suceptibility using ArcGIS Living Atlas" I can import the multispectral Landsat no problem, but when I ...
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Using QGIS Information tool on WMS Image Service

I'm new to QGIS but with decent ArcGIS experience. I'm trying to use the information tool in QGIS to interrogate the date an image was taken from a WMS (https://spatial-img.information.qld.gov.au/...
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Layer Swipe Implementation in Google maps

I have been tasked with adding the functionality of the layer swipe feature e.g https://openlayers.org/en/latest/examples/layer-swipe.html into google maps. I have been restricted to use only the ...
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Iterate over raster images and mosaic images based on same dates using model builder

I am trying to mosaic images with same dates in a folder. As there are images with different dates in the folder I have looped through the images with just SR_clip.tif extension using wildcard that I ...
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Projection best practices for applying ML to large scale Earth Observation imagery [closed]

I come from a data science background, rather than GIS, but work in a domain where remote-sensed imagery is widely used; so I'm still learning some of the do's & don'ts when it comes to the 'right'...
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Imagery in Field Maps slow to load when not same projection as basemap

I use field maps on an iPad and keep all iOS and App versions up to date. I had imagery in the basemap layer, but the imagery was in a different projection than I wanted the map to be in (because I ...
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Getting map data not yet available using ArcMap

I am using ArcMap. When adding imagery basemap everything works ok, until map is zoomed at 1:800 scale, then the legend "Map data not available yet" appears, but in others PC it is possible ...
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Conducting 'if' conditional and 'for' loop in Google Earth Engine

I'm going to conduct if conditional and for loop in Google Earth Engine. However, the process is completely different to other programming language such as MATLAB. I know about ee.Algorithm.IF and map ...
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Noisy lines in all scenes for Landsat 7?

I'm seeing patterned lines in all Landsat 7 images that clearly are image artifacts. There are lines that jet in from the edges (the center looks better) Does anyone know what it is and if there are ...
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Why are there no Sentinel-2 images in northern latitudes from November to January?

I have found that there are no Sentinel-2 images in northern latitudes from November through January (near 64.11837149, 67.75836280 coordinates). Number of scenes around the point with coordinates 64....
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Adding HTTPS image URL in ArcGIS Explorer programmatically

I have .jp2 and .tif satellite images hosted in my IIS web server. I am trying to access those imagery in ArcGIS Explorer programmatically through VB.Net (without actually downloading the image in my ...
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Should my Landsat 8 Imagery be Looking this Dark?

I'm downloading daytime satellite imagery from Landsat 8 and am slightly concerned that I'm doing something wrong because the imagery is so dark. This was a composite image of Indonesia I made: In ...
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Scene of imagery is missing

Sorry, i want to ask why some of imagery scene of my "area" is missing Here is the script var geometry = ee.FeatureCollection(area); Map.centerObject(geometry,7); var center = {lon: 109....
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Adding metadata information to imagery in ArcGIS Pro

I am working with imagery in ArcGIS Pro 2.8, and the data is World View 3. What I am trying to achieve is to use the Mensuration tools available under the mensuration sub-group in the imagery tab in ...
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Georeferencing from a set of points using lat and long

I have an image that is 2000x2000 pixels and I need to georeference the image using ArcGIS Pro. I have a text file with lat and long at various pixels: 469.4999917 -264.663705 0 E 73 N 504.0687029 -...
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Creating constant image of various values in Google Earth Engine [closed]

For general code debugging, I would like to run my code on a much smaller image that kind of mimics the real image to be processed. The reasons are two folds: one is to save computational time/...
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Understanding resolution of multispectral satellite imagery (EuroSAT)

I am trying to understand the data that is provided in EuroSAT : Land Use and Land Cover Classification with Sentinel-2. It is comprised of "Sentinel-2 satellite images covering 13 spectral bands ...
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Filter an ImageCollection by difference of two date properties

I have an image collection with two date properties: start and end. I would like to select only those images that are 30 days or more apart between the start and end date. I tried the following but ...
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Identify Pavement Markings from Satellite Imagery and export to shapefile

I have a 10cm x 10cm aerial photo of a city which I plan to use for classification of pavement markings (e.g lane arrows, lane lines, bike stencils etc.). Currently, the process I'm envisioning to ...
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How are map tiles created?

I have recently been diving into the world of maps and I got interested to know how map services work, like Google, Mapbox, Leaflet, Open Street Maps and many others. I was confused about the ...
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Combining image collection from different years using Google Earth Engine

I'm trying to estimate superficial runoff for urban areas, but aparently having problems to generate for 2020. The NDVI collection goes to 2020, but the urban collection only goes until 2019. In line ...
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Low resolution of imagery in Google Earth Pro

I want to convert an ECW into a format I can load into Google Earth and keep the quality(or at least ok quality, when I convert it to a TIFF or KMZ it is very low res). I am hearing talk about how ...
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Landsat 8 Collection 2 (C2) Level 2 Science Product (L2SP)

I am exploring data sources for land surface temperatures (LST) for summer 2021. From Landsat 8 Collection 2 Surface Temperature (https://www.usgs.gov/core-science-systems/nli/landsat/landsat-...
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gdalwarp on County-wide mosaic or COG takes forever or seems to hang

I am creating Cloud Optimized GeoTIFFs using gdal from a folder of TIFF files in GDAL for an entire county. After creating a mosaic of these files (in EPSG:6551) using gdalbuildvrt I can create a COG ...
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Reason behind the white line on a SAR image?

So I'm reading a paper about satellite data and SAR imaging and I came across this image. I couldn't help but notice this white line running from top to bottom of this example image. Does anybody know ...
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How to remove black stripe on hyperspectral image band?

I saved individual bands from a hyperspectral image and saw that some bands have this big black stripe that run from bottom to the top of the image. I tried applying some filters available on ENVI and ...
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Seeking free satellite imagery basemaps to be used in webapps with frequent updates

I am looking for satellite imagery base maps to be used in my web application. I have been using Google satellite base maps, but they are very old. I need something which has frequent updates, weekly ...
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Sid image files and Orfeo Toolbox

Does anyone here know if the open source remote sensing/image analysis program Orfeo be made to work with .sid files? I can't find the answer in the documentation, every time I try to load a sid it ...
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Empirical Line Method (ELM) in ArcGIS Pro (2)

I am working with Remotely-sensed imagery (10x10cm) from the Netherlands. My images from 2017, 2018, 2019 and 2020 from the same area, recorded in the same time of the year, all look different ...
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MBTiles to PostGIS

I have an MBTiles file /database containing aerial imagery. Does any one out there know of a way to store a MBtiles database into a PostgreSQL/PostGIS database?
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QGIS SAGA's Principal Component Analysis (PCA) makes output rasters (components) bigger

I have multispectral TIFF bands/features (dtype = float32) that I passed onto QGIS SAGA Principal Component Analysis tool to perform PCA. The bands are each a separate file but have exactly the same ...
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Export Canvas extent inside QGIS at a 1m resolution GeoTIFF format

I am working with the "XYZ Tiles Google Earth" inside QGIS and I have an area of interest that is roughly a 2 nautical mile radius that I would like to export as a GeoTIFF with a 1m ...
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Conversion of UAV DN values to reflectance

My aim is to carry out fusion between Sentinel 2 and UAV images. Sentinel images are already converted to reflectance values but UAV images are in DN number format. How can I convert UAV DN values to ...
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ArcMap 10.7, Is it possible to mosaic rasters using a method that prioritizes rasters by the proximity to it OWN center?

I am working with older imagery that has been manually scanned, and as expected, the fidelity of the images is more reliable towards the centers of the images. There is a good deal of overlap in the ...
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3 votes
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Water color significantly different from different relative orbits?

I've been examining satellite imagery (Sentinel-2) and noticed that water can look significantly different in images from different relative orbits (seems to happen consistently for the examples below)...
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Fixing local orthorectification mismatches leading to small georeferencing errors?

My project uses good quality high resolution orthorectified imagery (from the government) as its reference base layer. I complement it for vegetation analysis with additional imagery from a different ...
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Should I always choose Sentinel-2 atmospheric-corrected imagery?

Sentinel-2 imagery is available in the default L1C form, or in the atmospheric-corrected L2A form. I haven't been able to find a L1C - versus - L2A comparison that would provide the pros and cons of ...
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Can't upload raster file on PostGIS

I've been trying to upload my satellite imagery which is 1.5 GB to my PostgreSQL database, using the code below, the error for each command is stated below; raster2pgsql -s 4326 -t auto -F -I -C -Y '....
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Automate making imagery index layer

I am wanting to come up with a way to speed up my Imagery Index layer. To give you an overview I have about 500 imagery files. They cover extents all over Australia. I am wanting to create a shapefile ...
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How to get whole image exported from Google Earth Engine?

I used the LANDSAT 8 TOA data to create an NDVI image. I want to export the image to my Drive. I have most of the code and it works, but I can't get the whole image in the export. It should cover the ...
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Is there a way to detect the status of the Esri world imagery basemap service programmatically prior to opening an MXD?

We have a web application that programmatically exports an MXD to a PDF. In this MXD, we have Esri's world imagery service added in one of the dataframes. However, when the imagery service is down ...
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Reprojection issue in Image collection after Filtering using Google Earth Engine

I am trying to reproject an image collection, but it fails after I apply filtering by (space, time, and cloudy cover percentage)!? Here is the code: Map.centerObject(geometry); var S2_f = S2....
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Is it possible to export the Google Earth Engine basemap (satellite version, not map), instead of something from an image collection?

I was originally going to use Landsat8 or Sentinel Data, but they don't go as clear as I thought they would. I'm looking for something at around 1m per pixel (Landsat8 is about 30m per pixel), like ...
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Custom Sensor type for New Ortho Mapping Workspace in ArcGIS Pro

Is it possible to bring a sensor type (Satellite) which is not yet included in the available sensor list to create a new Ortho Mapping Workspace in ArcGIS Pro using Python ?? for example the sensor ...
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1 vote
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Combining imagery, masking and sampling in Descartes Labs Platform

I am trying to sample data from Descartes Lab imagery to train a random forest classifier in the Descartes Plaform for an agricultural region. I have already written a script to prepare the imagery of ...
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Merge neighboring image tiles into a single image

I have a set of satellite image tiles from Bing Maps (info here). The tiles' names specify tile coordinates within the tile system and zoom, e.g. 156608-142775-18.jpg. An example set of tiles: ['...
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4 votes
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Using rasterio to crop image using pixel coordinates instead of geographic coordinates

I'm trying to extract a series of random patches of image from a larger satellite image (from worldview3). I want to extract patches of uniform size (say 512x512 for example). If it were a normal ...
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Interpretation of NDVI values

This might be a trivial question, but please bear with me. So I am using python and Sentinel images and I want to calculate NDVI, which is (NIR-RED)/(NIR+RED). So in the case where the final result ...
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1 vote
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Why using buffers in land use / land cover classification task?

I am following the tutorial How To: Land-Use-Land-Cover Prediction for Slovenia and I would like to understand why they used a positive buffer (expanding boundary limits) in the first part of the ...
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