Questions tagged [imagery]

Imagery refers to raster based datasets acquired from sensors on satellites or aircraft.

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22 views

Getting stripe across tiles without buffering image?

I am new to geotools. I need to get a horizontal stripe of bytes from the image data without buffering the whole image. I've looked at the various envelopes and pretty sure I could use just ...
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16 views

Methane emission free satellite imagery for seminar finals? [migrated]

I am looking for a downloadable satellite imagery that provides methane emission data in the Middle East region (Jordan, Israel, Egypt, Lebanon and Syria). So far I have not been able to find any ...
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1answer
21 views

Radiometric calibration of WorldView-2 imagery using ArcGIS Pro

I am attempting to work with worldview-2 imagery that I have downloaded and I am trying to radiometrically calibrate the raw imagery following the methodology outlined here. Since these are my first ...
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17 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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34 views

Increase the resolution of Google Earth Engine images

I am trying to fetch high quality images from Google Earth Engine. I want to understand the relationship between zoom_level option in: Map.centerObject(image, zoom_level); and scale option in below ...
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1answer
56 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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13 views

Resolution issue with NAIP data

I have loaded a NAIP tile for a small area in VA to QGIS, and compared it to the ESRI satellite imagery I already have. I'd like to use NAIP but the resolution when I drill down to individual features ...
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1answer
32 views

Seeking aerial imagery for small site in VA? [closed]

I am trying to locate the best aerial imagery to use to assess a small area in Virginia using QGIS 3.6. I need to buffer features around water features and overlay onto aerial imagery to show ...
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1answer
38 views

Reading large image using GDAL?

I want too read large image. The image size is 92117 x 30313 pixels. So far I know cv2.imread can not read large size. How can I read using GDAL API?
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20 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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24 views

Creating a pseudo-heatmap based on time spent in an AOI

I wanted to see if there was a way to create a heatmap based on time spent in a certain AOI. What I mean by this is a layer you can toggle on/off that would go from clear to red as you spend more ...
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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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1answer
70 views

ArcGIS Pro not loading associated world file with .PNG raster

I am fairly new to GIS, and brand new to ArcGIS Pro (came from ArcMap). I recently created a visual basic program that generates an image from the Google Static Maps API with a respective ESRI ...
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85 views

Add basemap copyright in QGIS?

I am using the QuickMapServices plugin for basemap imagery and was wondering if I can add a QGIS legend that includes default copyright information? I know this can be done in ArcMap...!
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1answer
57 views

Exporting bounding area only via ArcGIS Pro?

I use ArcGIS Pro to export a layout as jpg format image. I just wonder if any tools in ArcGIS pro can help me export the polygon area only and remove or symbolize the rest area as grey? My quick ...
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224 views

Google Satellite Imagery Offset in QGIS

I am using Google Satellite imagery as a base map to capture the vector data in QGIS 3.2.2 for past couple of months. Yesterday i noticed that the google imagery has offset issue in some locations ...
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14 views

How do I control the display of certain rasters in a mosaic dataset?

I have three mosaic datasets that I want to combine into one master mosaic dataset: I want to display the city imagery on top, the regional imagery next, and the county imagery on the bottom. They ...
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1answer
216 views

Downloading map tiles/image from website

There are two Norwegian websites that have satellite imagery I need, https://kart.finn.no/ or https://www.norgeskart.no . Is it possible to save a certain area when zoomed out so the scale is 200m, ...
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15 views

No Data Holes in Certain Tiling Scheme Levels in Mosaic Dataset Imagery Cache

I have a mosaic dataset containing three other mosaic datasets (one containing county imagery, one containing regional imagery, and one containing city imagery) I have them ordered by putting the ...
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43 views

Can't open WMS that worked before

I've been trying to access a several WMS servers in order to visualize imagery on my QGIS but when I put the URL on the searcher no results are given, as if there were no WMS server with such URL . I'...
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1answer
48 views

Dataset description AREA_OR_POINT

What are the differences between these two options in satellite image metadata?
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1answer
1k views

How to visualize multiband imagery using rasterio?

How do I plot a satellite image using rasterio? I'm able to plot the individual bands but not the entire image. Is there a way to combine the separate R, G, B numpy arrays to create a standard RGB ...
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1answer
465 views

Adding Here WeGo Satellite imagery to QGIS?

Here WeGo has more updated imagery for Cambodia than Google. I would like to add the WeGo image tile to QGIS. I have followed the instructions here and can add the WeGo street layers to my map of ...
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29 views

Are there absolute minimum or maximum values for Sentinel-1 GRD images?

Sentinel satellite imagery has become a standard product for operational Earth observation. For the SAR case, this holds for Sentinel-1 ground-range-detected (GRD) imagery, in particular when terrain-...
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1answer
50 views

Focal length vs Principal point

I have set of areal imagery. One of a parameters I get with images is camera's Principal Distance , what I'm looking for is Focal length, but I don't have Focal length at the moment I tried to ...
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1answer
29 views

Creating ArcMap where two parts of different imagery basemaps are visible at once?

I am using ArcMap to create backgrounds for a book of poetry where the backgrounds of poems are satellite imagery. I would like to have a section of my map be from a BW image and another from a color ...
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1answer
38 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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30 views

How much sidelap is adequate for aerial imagery?

How much sidelap is adequate for aerial imagery? My AOI has few buildings taller than 3 stories. I want to minimize building lean. I've seen imagery with 40% sidelap and the building lean is pretty ...
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1answer
290 views

Automatic digitization [closed]

I would like to know if it is possible to auto digitize a satellite image on ArcGIS 10.5. I need the building shapefile of a large remote area. I tried manual digitizing but its been stressful. I'm ...
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110 views

Download 3-month composite images from Planet.com?

I work in an area where cloud cover is probably the worst in the world. I have a free student account at planet.com and if I slide the cloud cover setting to less than 20%, then no images turn up in ...
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1answer
44 views

Are objects on periodically updated satellite imagery expected to shift and what to do about it? [closed]

Background 1: The organization I work at creates and maintains the road network of the entire country as line features, along with some points of interest. They do this by acquiring high resolution ...
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47 views

Why does ArcMap's Apparent Reflectance function call for Radiance Gain and Radiance Bias?

This documentation, as well as the function properties window, call for Radiance Gain and Bias to produce what ArcMap is calling "Apparent Reflectance" -- a term I am not otherwise familiar with. My ...
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49 views

Getting hazed figure when exporting a high resolution image in QGIS

I have a raster map made in QGIS. I am trying to export that map in .tiff format in high resolution (Somewhere around I can get a file of 300 MB). So I am exporting the image with a resolution of 960 ...
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1answer
43 views

Colorize radar imagery so it looks like optical imagery

Here is an imagery from a radar satellite Is it possible to colorize a radar image, so it looks like and enables the same kinds of analysis as for an image captured from an optical satellite (simple ...
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2answers
215 views

Strips/scratches on PlanetScope imagery

I'm doing a project that evaluates the practicality of using remote sensing imagery in agricultural field management. I noticed there are some scratches/strips on PlanetScope imagery for one of the ...
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1answer
575 views

Are there high resolution images available for download on earthexplorer?

The problem with earth explorer GeoTiff files is, if you zoom in enough, the resolution is very fuzzy. If you want to look at your backyard, for example, that is impossible. If you use the earth ...
2
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1answer
677 views

Downloading image/exporting image to google drive from google earth engine with color palette

When I download Analysis results from Google Earth Engine, the image is exported in to google drive but it does not have a color palette. How do i add color palette with the exported image using earth ...
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25 views

ArcMap Imagery Service Not Displaying Correctly

I am using a NAIP service to display aerial imagery. It appears as if only one tile is ever being pulled. I have played with mosaic properties of the service with no success. The tile changes every ...
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1answer
74 views

Purchasing NDVI imagery for South Western England? [closed]

I am working on a project developing an application for livestock farmers where they can monitor their feed using satellite data. The main aim is to calculate the biomass of a field of grass. The ...
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2answers
134 views

What does 4.5 mm resolution mean?

this is a rather simple and trivial question, but before I contact my supervisor I want to get sure. I have a .tif image that says the resolution is 4.5 x 4.5 mm. The output of gdalinfo is: Pixel Size ...
2
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1answer
236 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 ...
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1answer
190 views

Why does kmz with orthomosaic show white squares with red Xs when zooming in Google Earth Pro?

Every time in the morning when I first open my Google Earth Pro, Why does my kmz that has an orthomosaic show white squares with red X's when you zoom in? Here is a screenshot: I tried to clear out ...
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0answers
21 views

ArcGIS imagery analysis difference raster errors

I have two DEM rasters from the USGS NED dataset. One is from 2013 and one is from 2017, the extents should, and appear to, be 100% identical. I ran the difference function on the ArcGIS Imagery ...
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89 views

Calculating albedo using NAIP imagery?

I am attempting to calculate albedo using NAIP imagery 4 bands (visible-NIR). Zhao et al 2015 used quick bird imagery to calculate albedo using the following equation: Albedo = -1.694(band1(blue))+2....
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1answer
1k views

How to split multiband image into image tiles using Rasterio?

I have been using this answer on GIS SE to split 3-band (RGB) imagery into 256x256 3-band image tiles: import os, gdal in_path = '/path/to/indata/' input_filename = 'dtm_5.tif' out_path = '/path/to/...
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1answer
106 views

Increase contrast of merged Planet Labs scenes

I've download a few PlanetScope scenes from Celaya, MX. Taken alone they have a good contrast. Then I've merged them with gdalbuildvrt, which lowered the contrast: Link I've thought, that I could ...
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0answers
240 views

Seeking software similar to Google Earth Pro?

Are there other software products similar to Google Earth Pro? I am looking for a recommendation that: Can import an image to the software to overlay an exist imagery. Must have historical imagery ...
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1answer
112 views

Tree Cover Change analysis on QGIS, “Stripes” or “Banding” on the image

I am currently looking at Tree Cover Change around a set of 288 villages in the Equatorial Forest of Africa using QGIS. In order to do so I am using the GFCC30TC: Global Forest Cover Change (GFCC) ...
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48 views

Georeferencing in ArcGIS: from or to?

I am trying to georeference a newly acquired satellite image to a previously georeferenced image, i.e. match the newer raster to the older one with manually or automatically created control points. I'...
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1answer
756 views

Is Esri high resolution (0.3m) imagery service still available?

Neither the World Imagery basemap in ArcMap nor the service at ArcGIS Online provide high resolution (0.3m) images anymore. Has anybody been able to access the 0.3m resolution imagery recently? ...