Questions tagged [imagery]

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

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17 views

Satellite image analysis using sentinel in python

I am trying to download the map of certain region using Sentinal. I am using "BANDS-S2-L1C" to authenticate. When i try running an algorithm to fetch the data of the region, it is throwing "Server ...
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High resolution RGB satellite images for different daytimes and seasons of the year

I am looking for high resolution RGB satellite images with the following requirements: Very high resolution: ~1m per pixel Coverage: Big cities in US and/or Europe Revisits during different daytimes (...
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15 views

Drone Imagery Footprints & Quaternions

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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16 views

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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20 views

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
43 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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19 views

Split .tif image in Python using GDAL

I am trying to split .tif image that i have downloaded from satellite imaginary. The .tif image is 114MB and has lot of data and i want to split the image into further small images to work more on the ...
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15 views

Using object-based classification on a new set of imagery, without retraining the classification in ArcGIS Pro?

I am working with NAIP imagery for a county in PA in an attempt to create a classification scheme that I can use on other counties within the state. I'm very familiar with the process of creating a ...
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1answer
46 views

High resolution and reasonable cost RGB satellite images [closed]

I need to obtain high-resolution RGB satellite images with reasonable cost for Pakistan. The objective is to guide tourist on high-resolution GIS maps. Google Earth does not have very high resolution ...
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1answer
28 views

Binding multiple Leaflet image overlays as one

I am planning to put at least ten single image overlays, spread across the country. I have got two so far: var priorycourt = 'Priory_court.PNG', imageBounds = [[52.399892, -1.531154], [52.400837, -1....
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46 views

Google satellite xyz tile layer in QGIS has lower resolution than the basemap in Google Earth?

As far as I can tell, the Google satellite imagery loaded as an xyz tile in QGIS is the same image that is used in Google Earth, but at a lower resolution. The lower image below is from QGIS using the ...
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24 views

Getting stripe across tiles without buffering image?

I am new to geotools. I need to get a horizontal stripe of bytes from the image data without buffering the whole image. I've looked at the various envelopes and pretty sure I could use just ...
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1answer
29 views

Radiometric calibration of WorldView-2 imagery using ArcGIS Pro

I am attempting to work with worldview-2 imagery that I have downloaded and I am trying to radiometrically calibrate the raw imagery following the methodology outlined here. Since these are my first ...
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19 views

Storing earth observation derived attributes for polygons [closed]

I want to generate a number of vegetation related indices (NDVI, NDTI, etc., min/max/avg/std (pixel values)) from earth observation data for a large number of polygons during the entire growing season,...
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49 views

Increase the resolution of Google Earth Engine images

I am trying to fetch high quality images from Google Earth Engine. I want to understand the relationship between zoom_level option in: Map.centerObject(image, zoom_level); and scale option in below ...
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1answer
59 views

QGIS displays satellite data very blurry when ArcGIS Pro looks clear?

I am looking at a WorldView 3 image in QGIS (right in image) and in ArcGIS Pro (left) and there is a huge difference in quality. QGIS looks so blurry/a lower resolution. Any idea what's happening?
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Resolution issue with NAIP data

I have loaded a NAIP tile for a small area in VA to QGIS, and compared it to the ESRI satellite imagery I already have. I'd like to use NAIP but the resolution when I drill down to individual features ...
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1answer
35 views

Seeking aerial imagery for small site in VA? [closed]

I am trying to locate the best aerial imagery to use to assess a small area in Virginia using QGIS 3.6. I need to buffer features around water features and overlay onto aerial imagery to show ...
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1answer
55 views

Reading large image using GDAL?

I want too read large image. The image size is 92117 x 30313 pixels. So far I know cv2.imread can not read large size. How can I read using GDAL API?
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How to create coordinate system (using Lat/Long) across IR & VIS satellite images

A recent project of mine has been to gather IR and VIS data from WeatherUnderground's online site for the purposes of creating fun and informational temporal GIFs. Now, I'd like to take it a step ...
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25 views

Creating a pseudo-heatmap based on time spent in an AOI

I wanted to see if there was a way to create a heatmap based on time spent in a certain AOI. What I mean by this is a layer you can toggle on/off that would go from clear to red as you spend more ...
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22 views

Seeking night satellite images on which light from Earth can be seen? [duplicate]

I am working on a college project making cubesat. I'm in the group containing a sensor that will be used to measure light pollution. Currently we are trying to find existing images of earth containing ...
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1answer
84 views

ArcGIS Pro not loading associated world file with .PNG raster

I am fairly new to GIS, and brand new to ArcGIS Pro (came from ArcMap). I recently created a visual basic program that generates an image from the Google Static Maps API with a respective ESRI ...
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100 views

Add basemap copyright in QGIS?

I am using the QuickMapServices plugin for basemap imagery and was wondering if I can add a QGIS legend that includes default copyright information? I know this can be done in ArcMap...!
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1answer
62 views

Exporting bounding area only via ArcGIS Pro?

I use ArcGIS Pro to export a layout as jpg format image. I just wonder if any tools in ArcGIS pro can help me export the polygon area only and remove or symbolize the rest area as grey? My quick ...
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268 views

Google Satellite Imagery Offset in QGIS

I am using Google Satellite imagery as a base map to capture the vector data in QGIS 3.2.2 for past couple of months. Yesterday i noticed that the google imagery has offset issue in some locations ...
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14 views

How do I control the display of certain rasters in a mosaic dataset?

I have three mosaic datasets that I want to combine into one master mosaic dataset: I want to display the city imagery on top, the regional imagery next, and the county imagery on the bottom. They ...
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1answer
274 views

Downloading map tiles/image from website

There are two Norwegian websites that have satellite imagery I need, https://kart.finn.no/ or https://www.norgeskart.no . Is it possible to save a certain area when zoomed out so the scale is 200m, ...
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No Data Holes in Certain Tiling Scheme Levels in Mosaic Dataset Imagery Cache

I have a mosaic dataset containing three other mosaic datasets (one containing county imagery, one containing regional imagery, and one containing city imagery) I have them ordered by putting the ...
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44 views

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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1answer
52 views

Dataset description AREA_OR_POINT

What are the differences between these two options in satellite image metadata?
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1answer
2k 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
524 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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34 views

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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1answer
56 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
32 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
47 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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30 views

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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1answer
360 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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124 views

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
45 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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62 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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49 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
47 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
231 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
657 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
779 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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25 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
75 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
139 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 ...