Questions tagged [imagery]

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

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Image Enhancement in QGIS

Can I have assistance on methods to carry out Image enhancement: contrast enhancement, intensity manipulation and sharpening, and filtering on QGIS to produce results as in the following image: The ...
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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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47 views

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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Getting the imageID within a set of images (imageCollection) using the targeted coordinate

I am trying to download a high solution satellite image of a targeted area (roughly 30m * 30m) with (-80.562459, 43.470784) as the center. This is my approach. I am accessing the skysat dataset: https:...
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Graph of the variation in time of the nival surface

How do I calculate the area of snow for all the images in a collection image? When I apply the script it only calculates me from an image. And after to generate a chart var landsat = ee....
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52 views

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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115 views

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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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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107 views

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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273 views

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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No data values collars error - delete values from image

I have a satellite image that has collars outside of the image. When I set no data value as 0 and set this colors as no display it also removes the pixels from the image with 0 - RGB. The image is ...
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2answers
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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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1answer
111 views

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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154 views

Cloud Masking of Sentinel-2-L2A images

I am trying to follow this Tutorial but in a different country. I am currently having a problem with cloud masks. I tried to visualize the different cloud masks of different patches at different dates....
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103 views

Saving as/export results of GeoVisual Search (Descartes Labs)

I am working with satellite imagery processing. I'm using this service to search for some objects in the US: https://search.descarteslabs.com Can I export about 1k results, for example, to KML or ...
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Does geospatial server software exist which can support dynamically generated imagery as a WMS?

Here's the situation: Input: A bunch of data (NetCDF) that contains seperate variables/arrays for R/G/B channels. Desired output: Web service (e.g. WMS) that can serve simulated true-color imagery ...
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QGIS not displaying rasters from a saved project

I'm running QGIS 3.12.2 (current) I loaded about 10 rasters (satellite imagery) into a new project and digitized some polygons on each. I saved the project. When I reopened the project, the rasters ...
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Retrieve image from area

I'm looking for a way to retrieve an image (a satellite one, preferably) from a rectangular area of a map given a minimum and maximum latitude/longitude. What tools can I use to achieve this?
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When to choose between a raster or vector format?

I'm trying to decide how to best serve data layers on a map. The data will be preprocessed on the server. The workflow I'm currently trying to implement goes as follows: Acquire satellite imagery (eg....
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Image collection images to a 1D vector where there is one value corresponding to each image

I am currently working with MODI's land surface temperature image collection dataset of 20 years of data. I want to convert each image to a single value representation using mean/max function. I tried ...
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How do I extract data about the curve of a coast line from a satellite image using Google Earth Image?

I'm trying to use GEE to analyse the shape and curvature of ocean coast lines from satellite images. What I've been doing so far is: isolating an image from GEE, saving it as a png or jpg, and ...
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42 views

Seeking a GNSS data to be use for my work [closed]

I would like to understand what GNSS is used for? Can I download it from the website and use it for my work? I am not familiar with it. Does it come with the GPS? Does it come with horizontal ...
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1answer
29 views

Interpreting Historical Aerial Imagery - Agricultural Midwest [closed]

I was recently looking at some aerial imagery of a Midwest farm and wondering how to interpret a couple things. First, in the 1938 imagery, there are several fields that appear to have weird ...
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Earth Engine: How to input band values of image to a tensorflow model trained on array of values

I have a TensorFlow model that is trained on an array of reflectance values (red, green, blue, nir) to predict sediment (SSC). Now, I want to use Landsat 8 image over a region to get the SSC for ...
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Replicate the Google Earth Engine satellite basemap for analysis in code editor

I need high resolution cloud-free raster imagery (<1m resolution) for Montana, USA. Visually inspecting the Google Earth Engine satellite basemap looks to be higher resolution than NAIP imagery (...
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1answer
70 views

How to chessboard segment landsat pixel edges in python?

Does anyone know how to do a chessboard segmentation (in the same way that ecognition does) that will select all the edges of a Landsat pixel in python/a Jupyter notebook? Given that I can use the ...
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32 views

Latest Google Tiles for QGIS

I need to use a backgroud satellite imagery from Google but when I import the tiles to QGIS some clouds are over the site that doesn't appear in Google Earth. I checked the date of the imagery in ...
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Satellite imagery tiles not aligned

I downloaded LISS4 satellite imagery of my study area, consisting of multiple tiles. I digitize some area from one of the tiles but I found out that the other tiles don't seem to align with the first ...
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Publishing Image Services in ArcGIS Server vs. Tile Cache Data Store

Historically I've published images services through ArcGIS Server, but I now have an ArcGIS Enterprise tile cache data store on a dedicated server and I'm considering moving some image services over ...
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Obtaining Free High Resolution Satellite Imagery to use in QGIS

I just downloaded QGIS 3.10 Mac version the other day and I am still very green with the program. I was wondering what is the best way to obtain high resolution satellite imagery? I know there are ...
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1answer
163 views

Issue when transforming an EE.Image into numpy array

I use Google Earth Engine with Python 3 with Colab's notebooks. I would like to transform the Google Images into Numpy arrays to be used for further processing. I am using the toList Reducer to ...
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Satellite Imagery Comparison

Earlier in my searches I had come across this website which provided a fast switchback between all the map providers (Apple Maps, Google, Bing, OSM) where you had the chance to compare the satellite ...
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Combining two images one over other using ArcPy [closed]

I have to combine images from different satellites (with different spatial and spectral resolution) such that features of both are present in the final image. I am using ArcGIS. Please help me with ...
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1answer
55 views

ArcGIS Online and Nearmap Basemap Imagery

I am trying to get an exported Nearmap imagery as my basemap for an ArcGIS Online map. I have the Nearmap Image and it's respective georeference file (JPG File and JGW File). Is there a way to upload ...
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2answers
141 views

Writting into XMP and EXIF Metadata from attribute table values in PyQGIS

I've already learnt how to read EXIF and XMP data's from JPG. Now I would like to write from value in attribute table into their XMP and EXIF tags. This code Import EXIF / XMP , and I would like to ...
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1answer
58 views

Mosaic to New Raster with no output

I have a large set of 4-band high resolution NAIP imagery that I had put into a mosaic and am now trying to create a raster using the Mosaic to New Raster tool. When run the tool just says 'mosaic is ...
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Seeking free or recent aerial imagery

Is it possible to view either live or very recent (past few days) aerial imagery for UK? Ideally images would be satellite imagery, high resolution and free.
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Worldview-2 imagery coverage

I am attempting to acquire imagery from the Worldview-2 satellite, and finding limited coverage for many areas within the United States. Sometimes, coverage is temporally deep for a time period (say ...
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1answer
155 views

Determining Longitude and Latitude of each corner of image

With this information below, including image size, longitude/latitude (of upper left I assume, maybe center), Resolution, and altitude - can I derive the Long/Lat of each corner of the image? "size":[...
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Aerial Imagery Capture Location

I have been tasked with finding out where an airplane was when it took the photo used in some aerial imagery that we have. I have been supplied with 'RAW' data and need to know how to interpret it ...
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277 views

Getting Maxar Premium Imagery in QGIS

When you edit OpenStreetMap you have access to the Maxar Premium Satelite Imagery. That is more recent than other imagery in certain areas. How can I get Maxar Premium Satelite Imagery as a layer ...
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1answer
98 views

Orfeo Toolbox maps Pleiades wrong

I have a problem with Orfeo Toolbox (OTB) function OrthoRectification. I have a Pleiades product which is an extract (not a whole scene) of a small area in the western hemisphere south of the equator ...
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1answer
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Preparing two images with different dimensions to use in Agisoft PhotoScan

I have two aerial photos that are flowed over the national forest. The photos were scanned by a contractor and they came in various dimensions for each photos. The one I have had smaller dimension ...
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1answer
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Drone Imagery Footprints & Quaternions [closed]

I'm trying to use Drone Imagery Metadata to plot precise (or nearly precise) Imagery footprints on the the ground and I need some help with Photogrammetry / Trigonometry / Quaternions My repo is ...
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1answer
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Unable to activate analytic asset in satellite Imagery

I was trying to import the map of Melbourne. I was able to fetch the details from API coordinates but when i am trying to check the analytic asset status, it is returning inactive. # extract image ...
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Permissions are blank when trying to load satellite images from Planet API

I am trying to download the map of Melbourne using Planet API. I have given AOI coordinates of Melbourne. When I run the code the permissions are returning blank ("_permissions": []). I cannot able to ...
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1answer
143 views

Cloud mask for worldview

I'm using worldview imagery downloaded from gbdx and I want to apply cloud mask for it. It's preferable to use ready-made layer or some python module/tool to create it. The demand for the method ...

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