Questions tagged [satellite]

In the context of spaceflight, it is an object which has been placed into orbit by humans.

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30 views

Relation between spatial resolution and object size in satellite imaging

Is there a general rule of thumb that relates the ability of satellite remote sensors to resolve an object and the spatial resolution of the sensors? For example, a whale that's 15m in length and 7-8 ...
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44 views

How do I add projection information to this JPG and convert to geoTIFF in GDAL?

I have a .jpg image (weather satellite) that needs to have projection information applied to it and converted to geoTIFF in EPSG:3857, but due to the complexity of the projection I have no idea where ...
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Show number of added satellite images in PostGIS

I want to check how many bands of a satellite image have been added to a PostGIS raster table. I know that you can get information by \d raster_columns (as told here, but it seems as this gives only ...
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How can I insert a satellite image with multiple bands into PostGIS?

I am trying to insert a satellite image (e.g. a Sentinel Image) into PostGIS. What is the best structure to save the different bands? I know that you can use somehow use 'ST_AddBand' or 'ST_Band', but ...
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1answer
27 views

Satellite image in OpenLayers

I would like to know if there is a satellite map for OpenLayers. I made the following code: new ol.layer.Tile({ // A layer must have a title to appear in the layerswitcher title: 'Stamen', // ...
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How to index USGS ARD Satellite Data into an Open Data Cube?

I am trying to index a Landsat8-Satellite-Dataset from Massachusetts in the USA. I downloaded the dataset from USGS. Below my question you can find the datacube-metadata.yaml-File. It is surface ...
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21 views

Pseudo-range computing

I have to compute the relative pseudo-range for my student job, unfortunately, nobody can help me because they are not read into the topic enough. So I'm asking here: My receiver has to have a 1500 ...
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Preventing loss of detail using “Clip Raster by Mask Layer” QGIS

I am using a raster file of satellite imagry as input for a 'Clip Raster by Mask Layer' process and a shape file polygon as my mask layer. Each time I run the process the output clipped layer is ...
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45 views

Batch uploading GeoTIFFS to GEE

I have a folder of a few thousand GeoTIFF files of several years of satellite data that I wish to upload into my assets folder on the Google Earth Engine. The only way I know how to upload the data is ...
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Sentinel-2 and Landsat-8 future acquisitions

In order to schedule in-situ measurements at the time of Sentinel-2 and Landsat-8 overpass for my AOI, I would like to access their future acquisitions plans for the summer 2020 (July/September). I ...
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1answer
42 views

Adding Street layer to a Satellite map

I am new to openlayers and I am using OpenLayers Version: 6.3.1. I need to display a satellite map. I have used mapbox API to display the satellite map. It doesn't have streets and displays only the ...
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OTB Haralick Texture Measure Window Directions

I'm trying to understand whether otbHaralickTexture computes in all directions (0, 45, 90, and 135 degrees). I couldn't see any explanation about the issue in the documentation. I understand that ...
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Obtaining latitude and longitude on Earth from Satellite location and pointing angles

Considering the Earth as a perfect sphere and knowing the position (latitude,longitude and height) of a satellite. I would like to transform the pointing angle from the satellite (defined by two ...
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81 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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1answer
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gdalwrap incorrectly re-project wide angle

I'm trying to re-project Meteor-M 2 satellite image with gdalwrap. I have GCP points which I put into .vrt file: <VRTDataset rasterXSize="1568" rasterYSize="480"> <GCPList Projection="EPSG:...
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Can I find where a satellite image was taken in? [closed]

I really want to find where this is in because it was in my Math test and I've found a place like this before in another test but it actually had names around it so it was easier. I know it's blurry ...
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Processing Sentinel-3 SLSTR data using python via snappy API

I am trying to convert Sentinel-3 SLSTR S6 radiance data to a Geotiff file; However, I am finding converting the Sentinel-3 data which is in NCDF4 format to Geotiff format correctly very difficult. I ...
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How to create .mbtiles from live GOES 16 satellite imagery on AWS (netCDF)?

AWS provides [https://aws.amazon.com/blogs/publicsector/accessing-noaas-goes-r-series-satellite-weather-imagery-data-on-aws/](live GOES 16 satellite imagery) on their servers. What is the easiest/...
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1answer
47 views

Can satellite data have different locations of nodata values in different channels

I have some Sentinel satellite imagery. And I have noticed that it looks like there are different locations of nodata values in each channel's mask. (I read in the tif file with 3 channels in via the ...
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3answers
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Where can I get high resolution multispectral satellite imagery? [closed]

I'm new to GIS, so please be patient if my question is a bit naive. I would like to regularly monitor an area in the Czech Republic in multispectral image depth, with update at least once in a few ...
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1answer
30 views

Sentinel-2 Hub & satellite imagery data format

I acquire the raw JP2 imagery files from the Sentinel-2 project. Let's say I've selected a tile for a given sampling period and band (e.g. B01). Then, after using Python tools provided from here, I ...
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1answer
43 views

Calculate weight using distance from point for Weighted Reductions in Earth engine

I want to calculate the total yearly NO2 emission from the power plants by using Sentinel-5p NO2 data. First I defined my aoi and sum all 365 images into one image using ee.Reducer.sum(). After that ...
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GDAL “permission denied” on Windows

from osgeo import gdal ds = gdal.Open('/Data/F182010.v4/F182010.v4d_web.stable_lights.avg_vis.tif', gdal.GA_ReadOnly) The code showing Runtime Error Permission denied How to fix this? /Data/F182010....
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274 views

Correlating mol/m^2 with ton and lb? [closed]

How do I compare tropospheric_NO2_column_number_density(mol/m^2) of Sentinel-5p with EPA statewide emission data which unit is Ton or lb? Goal: My goal is to compare remote sensing no2 emission ...
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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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Sentinel 2 Conversion Relectance to Radiance?

Sentinel 2a level 2 digital number is a surface BOA reflectance. I want to convert this number to radiance, how should I do it? I use ArcGIS or Snap (there is reflectance to radiance but it requires ...
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2answers
497 views

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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47 views

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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How to geo-reference a level 1A satellite image to level 1B?

I have satellite images which are not geo-referenced. The metadata of images is below. name: 1235078921.68220448_sc00106_c1_PAN datetime: 2019-02-24T21:28:23Z gsd: 1.03381 bit_dpth: 16 Satellite ...
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1answer
119 views

Why are electric power lines so highly visible in satellite images? [closed]

In Google Maps, why are electric power lines so highly visible? I can find them every place in the United States that has above-ground power. For example, in the Google Maps image below, the high ...
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Satellites with higher revisit frequency

Sun-Synchronous orbit has a 16 day revisit. Geo synchronous though further away, observe the same spot on earth, and can provide data with higher frequency. Most earth observation satellites that ...
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1answer
339 views

Plotting a polygon on a GeoTIFF [closed]

I am trying to use polygon coordinates to plot polygons on GeoTIFFs of satellite images using gdal or rasterio, yet somehow I keep failing. There is two things I want to do: create a mask with only ...
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81 views

Optimal alignment of satellite images taken separately over the same geographic surface

I am given two satellite images of a location which has been subject to a natural disaster, one before the disaster and one after. I am given bounding boxes for the images.The images have been ...
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1answer
541 views

How do I add projection to this NetCDF file? (Satellite)

I have been working with satellite data from the GOES-16 satellite for quite some time now. A sample .nc file for this data is located at this NOAA AWS link I use gdalwarp to transform it for ...
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1answer
480 views

Is it a sank ship please see near japan [closed]

I found this photo on google map satellite mode looks like sank ship
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Opening Hyperion image using QGIS

I am trying to open my Hyperion image using QGIS, but it only shows a grayscale image, when I add the raster. I created the RGB for my Hyperion image, but the colors are not similar to what I see in ...
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0answers
23 views

Satellite moving target tracking simulation

I am trying to create a Simulation of an earth-pointing satellite. The satellite should track a moving target on the ground via an on-board camera. How can I calculate the goal attitude of the ...
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1answer
192 views

Satellite image disappearing when zooming in

I'm trying to get a satellite image using the SentinelHub plug in. This works, however, when I zoom in to make my other layers clearer (roads etc.) the satellite image disappears and the background ...
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1answer
51 views

Pansharpening ALL(8) worldview 3 and worldview 2 bands

Trying to pansharpen all the bands instead of just the R,G,B,NIR bands in worldview-2 and -3 imagery. ArcGIS Pro only has inputs for those previously mentioned bands in the pansharpening tool. Is ...
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1answer
98 views

Meaning of 'bnds' and dimensions in OCO2 v9 L3 data product

I cannot seem to understand what, for example, 'lat_bnds' means? Same go for 'lon_bnds', lat/lon_dimensions. These values come from the structurally flat NCDF4, sourced from the JPL as a custom ...
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2answers
235 views

Remove Angle or Projection in GDAL

I am completely new to GeoData so this might be somewhat of a silly problem, but I am having a problem with the angle GeoTIFF images tend to come with. I am collecting satellite images for a deep ...
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Finding satellite imaging showing developments in landcover in specific geographic areas?

I'm a student looking to compare the development in landcover every 5(ish) years across San Diego county & am not finding much luck with it so far.
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1answer
93 views

Satellite imagery for download

I'm new to GIS and I'd like to apply some machine learning techniques to decent-quality satellite data for making certain types of predictions. This would potentially be for commercial purposes. I'm ...
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0answers
50 views

Extracting or masking of very large raster to reduce file size on disk?

I have a very large 8-band raster (339806 x 61704) that I cannot load to memory to manipulate (R, raster:canProcessInMemory indicates I need 4999.16 GB of ram to load this file). However, I only need ...
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25 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
99 views

Geos projection not centered on the equator?

I'm working with QGIS and satellite view projections, in order to achieve something similar to the maps created by Richard Edes Harrison for Fortune magazine in the '40s (reference). I have a question ...
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1answer
63 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
1k 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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2answers
201 views

ESRI Clarity vs Google Maps satellite images, distortion due to elevation?

I have a couple of satellite images, each about 1 km square, of the same rock climbing area. One is from ESRI Clarity, the other from Google Maps. The Clarity image is projected to UTM and has a UTM ...
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Calculating Satellite Azimuth from Landsat WRS data?

I found the below answer in regards to how one identifies the satellite azimuth from Landsat Images, but am not sure how you translate the path/row into azimuth angle. I have searched for such, but am ...

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