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Questions tagged [satellite]

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

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Google Satellite Imagery

I am working with QGIS 3.4.3-Madeira. I am using XYZ Tiles to display Google's Satellite Imagery via a WMS link. Unfortunately there are limits to WIDTH and HEIGHT parameters so that when creating ...
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Soil Adjusted Vegetation Index Values (MSAVI2) are Not Within Expected Range

I am using MSAVI2 (Modified Soil Adjusted Vegetation Index 2) to analyze different land cover classes for a study area in southern Africa. The Land cover classes were taken from a Planet Labs ...
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What equivalent zoom level would ISS astronauts would be seeing the Earth?

Like for Google Maps, there are 20 zoom levels. What zoom level would approximately give us the view that astronauts have?
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Can't Add Mapbox hosted DigitalGlobe Basemap in QGIS 3.2

I'm having trouble viewing a Digital Globe base map in QGIS. I'm following Mapbox's instructions from their API https://mapsapidocs.digitalglobe.com/v2.0/docs/tiles (bottom section that describes ...
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How to find specific bearing, distance and elevation of a satellite [duplicate]

I am trying to find a specific bearing, distance and elevation to a satellite. I know there are websites but I need a formula to do this. I need to be able to find these things from a set of co-ords ...
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Open Pan Sharpened satellite images in Python?

I recently downloaded the SpaceNet Off Nadir dataset for work but found that the Pan-Sharpened images can't be opened in Python. I think it's probably due to the colour bands being undefined but I'm ...
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Is there a repository of Galileo Ephemeris data that includes corresponding calculated satellite position coords?

I'm trying to build/test an algorithm that will take Satellite-broadcasted Ephemeris data and calculate the Satellite's position/velocity based on a given time. It would be considerably easier to ...
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How to move polygon fit to Google satellite in Qgis [closed]

I have a huge polygon layer of land areas and houses in a river delta. It does not really align with the images form Google satellite, so I tried moving the polygon layer. When I do so, it can't be ...
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Is there a way to get georeferenced satellite tiles of any location on Earth? [closed]

I'm looking for a way to server or command line interface that a program can use to automatically generate a photorealistic satellite image of any portion of the Earth. It is critical that every such ...
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1answer
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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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Where can I find decent resolution (5m ish) night time orthophotography/satellite imagery data for Ireland?

Anything I've found so far has been incredibly granular. I need a resolution which is fine enough to see general lighting footprints for motorway junctions.
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FCC Galileo Waiver: What does it mean in practice? [closed]

Today the FCC approved the use of Galileo navigation satellites in the United States. According to gps.gov, The Federal Communications Commission (FCC) rules require licensing of non-federal ...
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How to get latest picture of my city from sentinel 2?

I was trying to get latest picture of my city from Sentinel 2, but had no success. I have registered on Copernicus website, found my city and drew a square around it. Then I clicked the "search" icon, ...
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Comparing raster - pixel colors using PyQGIS? [closed]

I would like to compare satellite pictures (raster) infra - red. I have 2 rasters from the same area. I would like the compare pixels with the same xy coordinate using PyQGIS. 10 different values ...
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Get a list of all the images that match the conditions in Google Earth Engine (not only the first)?

Normally when I run this code I get the least cloudy image but I want to know what the other images are. I use this code: var image = ee.ImageCollection('COPERNICUS/S2') .filterBounds(...
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What is the difference between Bing Maps, Here WeGo and Google Earth imagery in this area?

We are working on a project about the exploration of historical ruins via publicly available satellite imagery. This project is for a high school scientific research competition. In the photos below ...
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Satellite image in ArcGIS displaying bluish

This exported raster has the same setting of the original one, but it changes its displaying. I am generating it with export data. This is the original image (temporal file) This is the exported "...
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Seeking OpenStreetMap satellite images service beyond Google Maps service?

I have come back to a private QGIS project that I designed 3 months ago and I get a message from the Google Map Service like: For Deployment Purposes Only Are there attempts to provide satellite ...
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1answer
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Why Landsat images are tilted/rotated?

When I browse images from https://earthexplorer.usgs.gov/, I can see that all of the images from Landsat are all tilted/rotated at a certain angle. Why are they rotated? And what's that for? Below ...
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1answer
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Satellite image in ArcGIS darker than usual

This is one image from 2013 in some área. This is another image from 2014 in the same área, but darker. why? How can I display it like in 2013. Both are Landsat 8 images.
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What are the sources for old (1998 or earlier) satellite or aerial photos of the (southern) Netherlands?

Our municipality says that our garden is too big, according too the cadastre. If we can prove the situation has been already there for twenty years, then they won't charge us for the extra space our ...
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2answers
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Is any map with calculated NDVI available online?

Is there any map which has NDVI calculated? Where can I get highest multispectral satellite image which could be zoom to very large extent?
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Python folium package for 'satellite' map

I am trying to have a zoomable satellite map for my Transportation network analysis. Other free maps all OK but could not get satellite to work. I am using: token = 'pk....
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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
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Displaying hdf5 file at correct location?

I have downloaded the INSAT-K1 VHR INSOLATION PRODUCT (https://mosdac.gov.in/catalog/doi/36). This is satellite data in hdf5 format. When I display the raster in either ArcGIS or QGIS it appears at ...
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Aligning multiple images with different spatial resolutions

I am using 2 different satellite images that have different spatial resolutions. One of them has 1 degree and other has 0.25 degree resolution. I want to subtract one image from another. So I should ...
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RTK GPS Surveying

My RTK GPS surveying setup uses two Topcon HiPer V antennas, running Pocket 3D on a FC-5000 tablet. Over the past year I have taken 274 shots on the water's edge (to get the lake level) and there have ...
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1answer
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What is accurate GLONASS?

As I know, GPS gives accurate data for everyone. I've heard GLONASS have two types of data. High precision data available only for the Military. Low precision data for civilians. İs there an ...
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1answer
532 views

How to download satellite image from planet.com using API key

I would like to know what to do (step by step in simple words) and how to get data from www.planet.com There is tutorial https://www.planet.com/docs/api-quickstart-examples/ but anyways I have ...
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Image navigation/geolocation of geostationary MTSAT HRIT?

I am wondering if anyone has had any experience with image navigation of MTSAT HRIT images? My current workflow is: create geostationary scanning angle co-ordinates re-project to 0.025 degree ...
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2answers
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Determining if Sentinel-1 orbit is ascending or descending from absolute orbit number?

The file name convention for the Sentinel-1 mission is MMM_BB_TTTR_LFPP_YYYYMMDDTHHMMSS_YYYYMMDDTHHMMSS_OOOOOO_DDDDDD_CCCC, where MMM: mission identifier (S1A, S1B) BB: mode/beam (IE/EW/WV) TTT: ...
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1answer
134 views

Satellite data to position coordinates

Is there a step by step process to convert sets of raw satellite data to traditional GPS lat/long points or a website that takes the data and processes it? Example of the raw satellite data: $GPS30,...
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1answer
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Extracting a polygon from slanted Sentinel satellite image using R

I have a Sentinel image, the coordinates of the boundary are given. I want to extract/subset a polygon from it. I am using R and don't have any prior experience in GIS. I have downloaded some ...
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Automatic split a mosaic of satellite images into pieces

I have a mosaic of satellite images, but for the analysis, I need to define the boundaries of each part. Does anyone know how to do it in an automatic way? I need to get the red boundaries like on the ...
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1answer
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Exporting 16bit tiff sattelite imagery with the stretch/colour-balance applied by Arcmap?

Problem: I have 16-bit satellite GeoTIFFs from DigitalGlobe (QuickBird/WV2), which I wish to share with a colleague that does not have access to GIS software. When loaded into ArcMap, these ...
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Water contamination assessment in SNAP using sentinel-2 images

I recently started using SNAP. I need help with assessment of the current water contamination crisis in Gdansk, Poland. On 15.05 the local sewage pumping station broke and started pumping sewage ...
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Multi-Spectral High Resolution Satellite images for flood events

I'm searching for multi-spectral high resolution satellite images for flood events. I found a database of flood events from this link with dates and approxiamte locations (polygons) and I used the ...
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2answers
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Performing nighttime light intercalibration of DMSP/OLS in GRASS GIS?

I have 1 nightlight image of DMSP/OLS. It is uncalibrated. I want to calibrate the image based on Wu's (2013) methodology. Every time I try to run the command "i.nightlights.intercalibration" on GRASS ...
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1answer
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R does not load coordinate reference when importing a multiband tif raster from Triplesat satellite

I'm trying to read Triplesat imagery into R. However there seems to be a problem with the coordinate reference in the .tif file as the crs, extent and resolution are not loaded. I tried two ways of ...
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1answer
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Difference in Bit-depth in Satellite Images

I have DMSP/OLS and VIIRS satellite images. For the 1st image the bit depth is 8, for the 2nd image is 32. I want to make intercalibration between those images. Will it cause a problem due to ...
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Calibrating satellite images using observed points?

I was considering using cokriging in blending observed points with satellite images but this answer to Performing Cokriging in R? and the comments there urged me not proceed with cokriging. How can ...
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Is there an API for NOAA GOES 15 satellite data?

In August 2015, I was requesting GOES 15 GVAR_IMG satellite data because it had both visible and infrared light info (useful for studying cloud coverage and solar radiation). I remember having to ...
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Weird lines on google maps [closed]

While I was travelling with my GPS "ON" and tracking my route I found this strange lines in pink and green dotted lines when I zoomed out the map I found that the lines where coinciding with the ...
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Retrieve sentinel2 cloud mask through an API

Have you ever heard about an API to download sentinel2 cloud mask only ? Not all bands but just cloud mask. Because I just want to process a small part of each satellite tile and it's very time ...
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1answer
240 views

Get satellite lon/lat from NMEA sentence

I am working on a satellite tracking application where I can read NMEA data from file. Here are the NMEA sentences I have: $GPRMC,104426.591,A,5920.7019,N,01803.2893,E,0.117980,320.93,141204,,*0F $...
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1answer
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How precise is a volumetric calculation made with satellite stereo par imagery?

If I had an stereo par from Worldview-2 or GeoEye-1, how precise would be the calculation of mine's materials in cm3?
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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
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QGIS 3.0 incompatble with Openlayers and Quicmapservices plugins [closed]

Those plugins are very useful to my work, especially the satellite images. Now that I upgraded QGIS to the 3.0 version, they are not available anymore. How can I get back the content of those plugins?
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Sun-synchronus orbit for SAR satellite

I have been following the news about the launch of the PAZ satellite (a SAR imaging sensor). The orbit will be sun-synchronous. I know this is important for optical sensors to make sure they have the ...
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AOD measure from MODIS satellite images

I need to use the MODIS Terra images, in particular the daily data that contains information about Aerosol Optical Depth. What do i have to do is to obtain the value of AOD in some precise point(in my ...