Questions tagged [satellite]

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

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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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19 views

Creating segmentation masks for high resolution images?

I have some very high resolution satellite 30cmx30cm images. I am trying to label some things in the images using polygons or masks. How do I go about creating segmentation masks for this images. ...
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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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18 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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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
35 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
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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48 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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46 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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1answer
28 views

What do horizontal (H) and vertical (V) polarization mean for satellite radar?

I'm reading about synthetic aperture radar (SAR), and one of the basic concepts is that the transmitted and received signals can have "horizontal" (H) or "vertical" (V) polarization, but I can't find ...
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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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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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1answer
90 views

Compress Large size of satellite image by Open Source GIS software [closed]

I have a new challenge to compress large size of satellite image from 59GB to 10GB as maximum size by Open Source GIS software to publish it to GeoServer.
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1answer
36 views

Updating road database using QGIS?

I have a 2017 database for a road network. It has RUTM Coordinates, and other attributes. I have a 2018 database for the same road network. Due to the nature of GPS, the RUTM coordinates in the new ...
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29 views

Calculating satellite position in lat, lon given the position of receiver, altitude of satellite, azimuth and elevation angles

I want to calculate position of a satellite, given the position of the receiver, azimuth,elevation angles and height above ellipsoid for the satellite. I think this should be a simple geometry problem ...
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23 views

Projecting a satellite full-disc image?

I receive full-disc GOES-16 images wich look like this: I want to crop it and project it so it look like this: How can I do this? Ideally from a command line tool so I can automate the process.
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21 views

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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1answer
68 views

How to create georeferenced dataset from georeferenced satellite image? [closed]

I downloaded a nighttime light composite satellite image (https://ngdc.noaa.gov/eog/dmsp/downloadV4composites.html#AVSLCFC) which uses a scale for light intensity from 0 (no light) to 63 (max light). ...
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26 views

Downloading Aster level 1T product?

When I try to download Aster level 1T data from the USGS Earth Explorer site it asks me to enter my username and password over and over when I click on download link of my desired product. What ...
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1answer
30 views

High-resolution, hyperspectral satellite imaging?

I am hoping to expand my (biology-focused) research to include satellite data. For this, I'd need satellite imaging that includes multiple values in the visible spectrum (specifically, above 490nm) ...
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1answer
37 views

Didn't show all the column while export the CSV file while using Google Earth Engine

I'm trying to calculate the water areas and the statistics of each band for each water areas to see if there are seasonal changes. The exported .csv file only have the columns ("GNIS_ID","AreaSqKm","...
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1answer
21 views

Mapping Jason-3 Data in ArcGIS Desktop?

Has anyone figured out an easy way to convert Jason-3 data in NetCDF format to a GIS format (raster, shapefile, etc.) so it can be viewed in ArcGIS Desktop? Jason-3 data is available for free in ...
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54 views

Seeking Public API to get GPS satellite's position?

Is there any public availible API that allows you to retrieve the current coordinates of satellites such as GPS and Galileo? I've only found ways to get Satellites Ephemeries and calculate the ...
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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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45 views

Creating Workspace for Satellite Imagery in ArcGIS Pro?

I am trying create mosaic from Sentinel – 2 satellite data. To realize this task I’ve used “New Ortho Mapping Workspace” and “Satellite” Type. In next step I’ve chosen appropriate sensor type, the ...
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96 views

calculating HRMS using NMEA sentences including GPGGA , GPGSV, GLGSV, QZGSV,QZGSA, GPGSA?

I have NMEA sentences including GPGGA , GPGSV, GLGSV, QZGSV,QZGSA, GPGSA and GNGSA. my goal is to achieve HRMS accuracy meter. produced android devices for special intent gives GP/GN GST nmea message ...
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1answer
89 views

What is the minimum `metadata` specification for the Open Data Cube?

There is a standard metadata definition here, but I would like to create a new one, with only the absolutely required fields. What is the minimum set of values that can be used to define a metadata ...
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1answer
61 views

Downloading satellite imagery from German cities (zoomlevel > 13)

I am looking for a way to download satellite imagery for later use with ml similar to this: I have to download quite a number of these images so downloading directly from Google Maps isn't really an ...
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38 views

Using carto mobile iOS sdk download offline map having satellite map style instead of normal map style

Is there any way to use satellite map style for maps downloaded for offline usage using Carto Mobile SDK?
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1answer
220 views

Adding Yandex Satellite map in OpeLayers

How can I add Yandex satellite map in OpenLayers? new ol.layer.Tile({ title: "Yandex Uydu", baseLayer: true, visible: true, source: new ol.source.XYZ({ url: 'http://vec0{1-4}.maps.yandex....
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1answer
72 views

Visualization of 11-bit images

I'm trying to visualize a 11-bit TIFF image using matplotlib. To do it, I load the image using tifffile to obtain a 3D numpy array. Next, I have to down-sample the image because the array contains ...
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2answers
446 views

How are satellite images mapped to terrain coordinates so precisely?

Many geoinformation systems have both satellite images and terrain features (houses, roads, etc) with coordinates. So they can show terrain features drawn over the satellite image or they can display ...
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25 views

Gravity map GOCE

I'm trying to produce a gravity map out of some GOCE (Gravity field and steady-state Ocean Circulation Explorer) data I downloaded from ESA's (European Space Agency) GOCE archive. I'm trying to follow ...
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1answer
54 views

How to Sample Locations from a Satellite Image

I am using the Near infrared and red bands from satellite images to research soil quality in southern Africa. The study site is about 20 km wide and 20 km long so almost square shape, and I am using 5 ...
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20 views

Higest-resolution daily temperature products?

I'm looking to collect daily temperatures for a very small geographic area, and as such am in need of some high-resolution products. I have used MODIS, but the data comes with a 1km resolution. Are ...
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46 views

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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1answer
174 views

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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1answer
34 views

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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1answer
100 views

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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21 views

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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29 views

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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1answer
52 views

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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1answer
234 views

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
48 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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0answers
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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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1answer
116 views

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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2answers
73 views

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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1answer
64 views

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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1answer
59 views

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(...