12 votes
Accepted

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

EDIT as 2019-06-18: HRO (High Resolution Orthoimagery) is no longer available on https://viewer.nationalmap.gov/basic/. Instead, visit https://earthexplorer.usgs.gov/. You'll need an account (free to ...
MapTiler's user avatar
  • 1,621
11 votes

Identifying image location?

IMAGE REVERSE SEARCH WITH GOOGLE IMAGES Doing a reverse search using images.google.com I found this link from wikimedia commons: https://commons.wikimedia.org/wiki/File:M%C3%...
DavidTaubmann's user avatar
11 votes
Accepted

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

It appears that the projection information is stored using CF conventions. import rioxarray # for 'rio' accessor import xarray xds = xarray.open_dataset("glm.nc") Here is what is in xds: <...
snowman2's user avatar
  • 7,191
10 votes
Accepted

Is this satellite image of a blackout real?

NASA's "Black Marble" is not one satellite image, but a mosaic gathered over several weeks and heavily edited: The data was acquired over nine days in April 2012 and thirteen days in October 2012. ...
HDunn's user avatar
  • 8,546
10 votes
Accepted

Free satellite data availability for moon

Perhaps the following links might be useful: http://ode.rsl.wustl.edu/moon/coverage/ODE_Moon_shapefile.html https://webgis.wr.usgs.gov/pigwad/down/moon_dl.htm https://webgis.wr.usgs.gov/pigwad/down/...
Joseph's user avatar
  • 75.2k
9 votes

Python folium package for 'satellite' map

You can also use ESRI Satellite for satellite images. I used this: tile = folium.TileLayer( tiles = 'https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/...
Greg Kendall's user avatar
8 votes

Samples of 5 cm per pixel satellite imagery?

There is no satellite with a 5cm resolution. The best one that is available is 30cm (worldview 3, panchromatic). There are rumors that the military/secret service still have better ones in orbit (11. ...
Matte's user avatar
  • 6,225
8 votes
Accepted

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

As others have shown interest for this question I'll answer it using the information I've been able to gather so far: There might be more than one archive or old Soviet Union imagery. As there were ...
Camilo Rada's user avatar
  • 1,219
8 votes
Accepted

Noisy lines in all scenes for Landsat 7?

You should read about the Landsat 7 ETM+ SLC-off data This refers to all Landsat 7 images collected after May 31, 2003, when the Scan Line Corrector (SLC) failed. These products have data gaps, but ...
Yogesh Chavan's user avatar
8 votes
Accepted

Numpy is not setting properly nan values: arr[arr== 0] = np.nan

Your arrays are not all nan. It prints nan because that is how np.mean and np.std work, if the array contains any nans, the result will be nan. You can use nanmean and nanstd instead: import numpy as ...
BERA's user avatar
  • 68.6k
7 votes
Accepted

How to know which satellite took the image?

According to https://www.digitalglobe.com/sites/default/files/ISD_External.pdf you should have a field called satellite with a mnemonic like: “QB02”, “WV01”, “WV02”, “WV03”, “GE01”, “Aerial” Which ...
nmtoken's user avatar
  • 13.3k
7 votes
Accepted

Satellite image in OpenLayers

Both maps that @Mike mentioned in his comment require API key. One possible satellite map is Esri's (ArcGIS) World Imagery: var worldImagery = new ol.layer.Tile({ source: new ol.source.XYZ({ url:...
TomazicM's user avatar
  • 23.9k
6 votes
Accepted

Satellites to retrieve UV bands

The US Naval Research Laboratory has developed the "Special Sensor Ultraviolet Spectrographic Imager" (SSUSI). Versions of it have been aboard DMSP satellites since 2003, improving in accuracy. It ...
Mathnerd314's user avatar
6 votes

How precise are overpass times of sun-synchronous satellites?

I am not a specialist of orbits, but I'll try to answer. Given a theoretical overpass time on a sun synchronous orbit, the exact one is not that easy to determine, as it depends on a lot of factors. ...
O. Hagolle's user avatar
6 votes

Satellite image disappearing when zooming in

It's probably a missing tile. If that's the case, it has nothing to do with the fact that this is satellite imagery. It's because you're accessing remotely stored data that is broken up into tiles, ...
csk's user avatar
  • 24.4k
5 votes

Creating shapefile showing footprints of Rasters?

Ensure images have defined nodata. If source images do not, fix with something like one of the below, where 0 or 255 is the supposed-to-be nodata value: gdal_translate ... -a_nodata 0 ... outimage.vrt ...
matt wilkie's user avatar
  • 28.1k
5 votes

Creating shapefile showing footprints of Rasters?

The Previous Answers worked for QGIS 2.x. If you are reading this after 2020, you will find that the Answers don't work. What Works with QGIS 3.x is the plugin called IBAMA Processing. Install this ...
Devdatta Tengshe's user avatar
5 votes

Calculating new satellite position given pseudorange measurements

Algebraic solutions are not very common for GPS, however, several do exist. The most well-known one is probably Bancroft's. Others are Abel's and Kleusberg's.
somerandomdude's user avatar
5 votes

Free radar (SAR) satellite data

Sentinel-1 data is published as Open Data, with attribution, see licence here. Registration required. An API is provided. See Scientific Data Hub for details. Software is also provided to process ...
vinh's user avatar
  • 345
5 votes
Accepted

NASA world view (EOSDIS) coverage delay per day - scanning footprint issue?

Together Terra and Aqua image the entire Earth every 1 to 2 days. The cross track swath is about 2330 km (about 3000 km is needed for "true" daily global coverage). Compared to the geostationary ...
radouxju's user avatar
  • 49.4k
5 votes

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

I'm afraid, but there is only little chance, that such images will be in wide access. Most part of such images is still on film source, not in digital. Maybe there are resources, forums, trackers etc.,...
Sergey N's user avatar
  • 309
5 votes

Determining if Sentinel-1 orbit is ascending or descending from absolute orbit number?

For the quick and dirty way to find out if it is ascending or descending, it is easier to look at the start (or end) time. For instance, in Belgium, you get the ascending images at around 5 PM and the ...
radouxju's user avatar
  • 49.4k
5 votes
Accepted

Compress Large size of satellite image by Open Source GIS software

When in doubt follow Paul Ramsey's GeoTiff compression for dummies strategy. gdal_translate \ -co COMPRESS=JPEG \ -co PHOTOMETRIC=YCBCR \ -co TILED=YES \ 5255C.tif 5255C_JPEG_YCBCR.tif and ...
Ian Turton's user avatar
  • 80.4k
5 votes

Is it a sank ship please see near japan

This is not a ship that sank. It is a result of how the background image is made up of a large number of images that are combined. Google uses a multitemporal approach to creating their basemap and ...
Mikkel Lydholm Rasmussen's user avatar
5 votes
Accepted

Correlating mol/m^2 with ton and lb?

One mol of NO2 is 46.0055 g (reference here) and 1 pound is 453.592 g so, conversion factor from mol to lbs is 0.1014 lbs/mol. For converting mol/m2 to lbs/m2 in snippet code of this link Sentinel-...
xunilk's user avatar
  • 29.6k
5 votes
Accepted

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

Short; It will actually depend on what NO DATA values mean; are they representing missing values during acquisition? Or, as the production of these images requires many processing steps, erroneous ...
swiss_knight's user avatar
  • 9,776
5 votes

Is Satellite Image Continuous Data?

Just to add to what @Kostas VI. mentioned: Measuring means always approximation. If the approximation is "good enough", you would consider it "reliable data". What that exactely ...
Babel's user avatar
  • 67k
4 votes
Accepted

Sentinel-2A: Begin of operational period?

Update: 11/30/2015 -- Open data access is 'imminent.' Expect to see it in the next two weeks. I think they haven't released a date because they are not sure when everything will be calibrated and ...
Thomas's user avatar
  • 1,477
4 votes

Difference between spatial and geometric resolution

Resolution can be quite confusing as some say that spectral=radiometric, others (1&2) differentiate between the two, and as you noticed, that Wikipedia page spends a whole lot of words trying to ...
Paul's user avatar
  • 11.6k
4 votes

Is this satellite image of a blackout real?

Theories: On GIMP the light superposes very well for the two images, which is slightly suspicious. Another concerns would be that Puerto Rico seems to have no generators? Large cities like San Juan ...
Victor's user avatar
  • 1,852

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