Questions tagged [satellite]

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

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2
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2answers
273 views

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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1answer
435 views

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 ...
2
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1answer
389 views

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
100 views

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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3answers
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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
278 views

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?
4
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1answer
934 views

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....
2
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1answer
260 views

Writing custom Prepare Scripts for Open Data Cube?

How do I write custom prepare scripts for the 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 ...
0
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1answer
106 views

Displaying hdf5 file at correct location? [closed]

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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0answers
57 views

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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1answer
45 views

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
1k 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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2answers
1k views

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
298 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
265 views

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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2answers
150 views

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 ...
1
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1answer
171 views

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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2answers
133 views

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
112 views

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
77 views

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 ...
0
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1answer
31 views

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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0answers
145 views

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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0answers
247 views

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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0answers
128 views

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
426 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
47 views

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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1answer
4k views

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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2answers
136 views

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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0answers
108 views

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 ...
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0answers
145 views

Spatial prediction in GIS [closed]

I have a number of images, (these could be vectorised) that are label classifications. There are only 2 classes, 1 or 255. Each image is from a different date. For each date I also have data that can ...
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0answers
148 views

Changing raster display in QGIS to look same as ArcGIS Desktop?

I have a strange problem. I have noticed that the same satelite imagery looks totally different in QGIS and ArcGIS. The problem is that I need to get the same style in QGIS. I've tried to calculate ...
28
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4answers
973 views

Is there an online catalog for declassified Soviet Union Spy Satellite images (Zenit-4, Resurs-F1, Okean)?

I'm a glaciologist user of declassified US Spy satellite images (Corona Key Hole satelites, Hexagon, etc.), that provide an extraordinary record of glacier extent at resolutions equivalent to about 4 ...
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1answer
442 views

Open source remote sensing and satellite imagery DATA [closed]

What are the most known libraries of open source data related to remote sensing and satellite imagery? Especially applicated to agriculture? And what are their resolutions and frequencies?
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1answer
203 views

Color matching for satellite images

I have two Landsat 8 satellite images from two different dates in may. When I import them in ArcGIS they slightly overlap but the pixel colours don't match making it hard to run an NDVI. I have been ...
2
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1answer
240 views

Adding graticule overlay to satellite image

I'm developing a python script to turn Sentinel-1 satellite images in .SAFE-format into easy-to-read jpeg images. The calibration and projection works fine using gdal, but I am having trouble with the ...
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2answers
173 views

Seeking downloadable images for night?

Where can I download freely available images for night from for South Asian region? ?
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0answers
97 views

Removing “Bow-tie deletion line ” from my raster dataset

I am working on VIIRS SDR dataset where I have created geolocated and projected raster of "BrightnessTemperature" using "Latitude" and "Longitude" dataset given in HDF5 format using ENVI. Now my study ...
1
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1answer
316 views

How to make subset from satellite images without getting empty border?

I have Landsat 5-8 images, and after creating subset for the area of interest there is an empty border on the image as black part. How to remove it or how to create subset without it? Here is the view ...
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1answer
3k views

Classify satellite Image using Machine Learning [closed]

I am new to the field of Machine Learning and I want to know what all way I can implement machine learning to classify any satellite image.
2
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2answers
382 views

MODIS swath footprints - list of names or polygon dataset?

I'm trying to find either a list of all of the MODIS Terra swath footprints, or boundary dataset (i.e. polygons) with the footprint code as an attribute. I've searched high and low on various NASA ...
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3answers
365 views

Looking for old satellite images

I'm looking to display satellite images of regions on a timeline starting from 2010, preferably updated regularly say every month or so. Are there apis that provide that for commercial use ?
3
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2answers
391 views

Sentinelsat 0.12 Python

I am a beginner with computer programming and I trying to use Python pack, sentinel-sat 0.12, to download images of Sentinel 2, but I get back a response I don't understand: sentinelsat.sentinel....
2
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1answer
44 views

Historic land satellite imagery service [closed]

I need to examine certain areas over a period of several years to view the effects of urbanisation. It's largely a visual exercise. I've found one tool that does this and is easy to use[1] but it only ...
0
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1answer
130 views

How long can a Dove of Planet stay on orbit?

I would like to know how many Doves are in operation right now? Also, are there some satellites in standby process or fitting to the orbit? This question is because some customers ask me how many ...
2
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0answers
47 views

Google Satellite imagery gone wild with QGIS 2.18 [duplicate]

I'm using the OpenLayers plugin (version 1.4.3) for my satellite imagery. When I'm at 1:565 or less (the number on the right is bigger) everything is fine. See image below. When I'm at 1:564 or ...
2
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3answers
249 views

Where can get different satellite images for the same scene? [closed]

In a research paper, the authors make an experiment using 4 different images which are SPOT band 4, PalSAR HH polarization, Landsat TM band 5, DEM data. I attach one figure as example http://prntscr....
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0answers
108 views

How to check if area of interest has clouds in a sentinel scene

I am using python script to download sentinel 2 imagery. given area of interest and cloud condition, it's easy to download the scene. but I am more interested to know if there is some way to check ...
2
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0answers
71 views

Satellite looking angle calculation (non zero latitude for subsatellite point)

When calculating looking angles for geostationary satellites, it is assumed that because the satellites have an equitorial orbit, the latitude of the subsatellite point is 0. In reality, the latitude ...
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2answers
349 views

Where to download high resolution maps or layers for Greece?

I am trying to create management zones on selected fields in Greece, so I am looking for high-resolution layers (maps) to use as a base (preferably satellite imagery). Could you suggest me the best ...
7
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1answer
8k views

Is it possible to get satellite image tile sets from something like openmaptiles tiles offers?

I am able to get an offline tile set for the USA from here. However, I was wondering if it is possible to get satellite imagery of those tile sets. I have been checking online and most require to be ...