Questions tagged [aerial-photography]

Photographs taken from an airplane or another aircraft within the Earth's atmosphere.

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How to remove white background from rasters when background consists of multiple RBG values in ArcGIS Pro?

I'm trying to remove the background. Usually an easy task, just go to symbology and display the background values as "no color". Unfortunately, the RGB values for the background consist of ...
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How feasible is it to scan CORONA satellite imagery in the National Archives?

I'm building a dataset of several hundred historical CORONA satellite images for a research project. I know that one can request these images from the US Geological Survey, but new scans cost $30 ...
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Vegetation classification for aerial photography in QGIS

What I need to do is to use QGIS, for vegetation classification of some older and newer Aerial Photography. In the past we have used ERADS Imagine but I have seen that there is some plugin developed ...
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Relating, Joining, or attaching photos to a point layer

I have a number of historic aerial images that I am attempting to georeference or at a minimum attached to a point file so I can display them when hyperlinks are activated. I have a point layer that ...
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Uploading KMZ to ArcGIS Portal via ArcGIS Pro

I have several large KMZ files (Which are of aerial imagery). I have added them into ArcGIS Pro and wanting to publish them to ArcGIS Portal. However, due to the size of the files it takes forever. ...
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DEM generation using Agisoft Metashape Professional

Currently, I am processing Aerial photographs acquired in 1967 and 1984 (all are acquired by frame camera) using Agisoft Metashape Professional software. What I faced is; the DEM generated from 1967 ...
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GDAL: Stitching aerial photos with X, Y, Z coordinates and omega, phi, kappa

Long story short, I have a bunch of aerial images in JPEG that I convert to GeoTiff and a .txt file containing X, Y, Z coordinates and the omega, phi, kappa of each image. I need to stitch all the ...
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Geolocalizing archive aerial photos

I have ~125 analog aerial photographs from 1937 (examples below) and need to reconstruct their locations where the images were taken for a research project. Unfortunately, little is known about them: ...
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How to download the aerial linescan images from open data cube?

Below code gives the metadata information, using matplotlib the data can be plotted, but how can I download all the 134 aerial images in jpg format. Is there an option to download the image files ...
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Georeferencing historic airphotos along constantly-moving section of San Andreas fault?

I'm a geology graduate student working on a master's thesis project in which I'm measuring creep (movement) over time along a section of the San Andreas fault (in California, USA) using SfM derived ...
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Automatically labeling layers according to raster characteristics

The question is oriented more towards end user and came up during the preparation of field maps, which have to show previously mapped biotopes and their ID on an aerial image. The map is used to ...
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How can I have the ground sampling distance from the images?

I have some aerial images and I need to know how if I can have the ground sampling distance value from the image without calculate it from the plane fly's parameters.
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How to calculate the accuracy of georeferenced aerial images in meters if the mean error is in pixels?

I have scanned aerial images taken shortly after WWII and have to georeference them and calculate the mean error. I use the Projective transformation so the error after transformation is shown in ...
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Removing Black Edge in Aerial Imagery using ArcGIS Pro

How do I remove the black edge in image below on a raster aerial imagery? I am using ArcGIS Pro.
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Cropping borders from images without invalidating georeferencing using ArcGIS Pro

I am using ArcGIS Pro2.4. I have a large collection of georeferenced historical aerials. They all have borders of varying dimensions and varying shades of grey. These borders have to go somehow. I'...
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Georeferencing/orthorectifying oblique aerial imagery over water

Does anyone have any advice on how one might georeference/orthorectify oblique imagery taken over the open ocean from a manned aircraft? The aircraft will have an RTK-enabled GNSS/INS onboard. I was ...
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Converting tile image into raster using rasterio

I want to convert a tile image (.tif) into a raster data (.tif) and assign lon/lat to the data. (I know how to get the lon/lat of a tile.) The problem is I don't know how to assign lon/lat to a raster ...
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Interpreting Historical Aerial Imagery - Agricultural Midwest [closed]

I was recently looking at some aerial imagery of a Midwest farm and wondering how to interpret a couple things. First, in the 1938 imagery, there are several fields that appear to have weird ...
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Using computer vision for linear feature detection [closed]

I am considering to use CV methods to detect linear features in very high resolution imagery (i've added an example below). These linear features are made by animals which transverse this section of ...
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Image recognition between Improved vs Raw Land for city parcels from Aerial with QGIS? [duplicate]

Are there any tools or methods that allow QGIS analyze whether the lots/parcels have been untouched or developed, and return a "1" or "0" to a table or points layer or anything? I was thinking more ...
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2 votes
2 answers
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How to find image resolution data for Open Aerial Map images through the API?

I'm prepping a data set and would like to download all images from Open Aerial Map that have a ground resolution of say greater than 5cm/pixel. The web UI displays this data for each image: But I ...
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How do I rectify a distorted aerial image in QGIS?

When I place an aerial image in QGIS 3.4.15 it becomes distorted (in the attached the left image is correct, the right image is distorted). How to I rectify this?
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Seeking open source software or python packages to create orthomosaic and DEM image from UAV images [closed]

I would like to analyse UAV 2D images to create 3D point cloud, DES, and orthomosaic image. Can you suggest or mention some open source software or python packages?
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Create Quick View Orthophotos from aerial images and exterior orientation metadata [closed]

I'm looking for a way to get a quick overview of aerial images taken together with exterior orientation data. Available are horizontal and vertical coordinates of the camera, focal length and also the ...
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Should I build pyramids/overviews for the source files or for the virtual raster?

I have a virtual raster comprised of a lot of raster tiles of high-res aerial imagery. I wish to build pyramids/overviews to speed up the rendering in QGIS. Should I build them for the source files ...
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Ortho imagery overlapping a top of Hillshade

I have a hillshade mosaic dataset made from DEM and I also have another mosaic dataset made with a aerial photo. I will like to overlapping so I can see both layer together, however I don't want to ...
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2 answers
146 views

Sources for Free High-Resolution (4m or below) Orthophotography (Aerial Photography) [closed]

Does anyone know of reliable sites that provide high resolution Orthophotography for The USA? I am not looking for Satellite Imagery. This is limited to Aerial Photography (Orthophotography) or Ortho ...
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Convert pixels to coordinates

I have a vertical image with size (W,H). I have info about the coordinates in decimals of the the upper left and bottom right (Lat1,Lng1,Lat2,Lng2). I have the Ground Sample Distance (GSD) of the ...
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Red lines appearing in QGIS Georeferencing?

I am georeferencing some old aerial pictures in QGIS. The area encompass mountains, hills and a flat area. For some pictures the error is quite low and I am satisfied with the overlapping (error is ...
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Calculate transform from oblique raster, shape and CRS

Given a simple jpg of an oblique aerial photography, the geometry and a CRS I am trying to determine its affine transform so I can convert it into a GeoTIFF. import rasterio, rasterio.crs raster = ...
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2 answers
143 views

Georeferencing screen shot of Bing imagery in ArcMap?

I've been using the world imagery layer in ArcMap for hand-digitizing possible restoration sites. This has generally been adequate except for a few instances in which the imagery is a bit old and ...
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Attribution for Bing maps in QGIS QuickMapServices?

I've used a Bing map aerial in a report I'm writing for commercial services. I downloaded the Bing map aerial using the QuickMapServices plugin in QGIS. What attribution do I need to add to the map?
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Problem with WMS/WMTS Layer Image Quality in QGIS

I have been using an aerial provided by the state. I add the layer as a WMS/WMTS. Typically the quality is on-par with the resolution depicted in the online hosted mapping program (GeoWeb). However, ...
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Extract water areas from aerial photogrammetry DEM in QGIS

We are working with peatland restoration sites providing aerial photogrammetry of the restoration progress. We want to differentiate between areas water and bare peat which can look very similar in ...
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Trigonometry and calculating the elevation angle from aerial photography

I was wondering whether anybody could advise me on a way to calculate the elevation angle from a camera to an object in an aerial photograph taken from a known elevation with no suitable reference ...
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1 answer
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Is it possible to load a WMS aerial photo from a external map into QGIS?

Is it possible to load a WMS based aerial photo (like https://geoinfo.frankfurt.de/luftbild-2018) into QGIS and use it as a background-layer for internal use?
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2 votes
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How to automatically compare two aerial photographs with a GIS with regard to certain features?

At present, we are trying to automatically record the new use of land by buildings by systematically comparing aerial photographs (e.g. 2007 farmland -> 2008 warehouse). For this purpose, high-...
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Where can I get aerial maps for offline use?

I'm looking for somewhere I can get aerial map files for exclusive offline use. Essentially I need aerial files (JP2K, GeoTIFF, etc.) that can be purchased or acquired and hosted on a private offline ...
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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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2 votes
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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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1 vote
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Quantifying error on georeferenced aerial imagery

I georeferenced historical aerial imagery of a coastal area to estimate the size of oil sheens on the surface of the ocean. The control points I used were on land (street intersections, buildings, etc....
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3 votes
3 answers
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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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Creating world files for a batch of aerial photos

I am looking for a way to geolocate a bunch of aerial photos by creating a world file per photo. The photos are taken in the same orientation and from the same altitude. The work flow would be to ...
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1 vote
1 answer
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Photogrammetry route flown using Litchi misses photos at some waypoints

I have recently started using Litchi to fly waypoint-based photogrammetry flights with a DJI Phantom 4 Pro. The routes were created in DJI Flight Planner, then edited, uploaded, and executed in the ...
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2 votes
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Measuring acreage from satellite image?

I am trying to use a ESRI basemap satellite image in order to obtain forest acreage values from a tax map parcel (image included). I have a parcel that contains farmland and forested areas, and I want ...
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2 votes
1 answer
138 views

Aerial Triangulation by using GPS height

Is it possible to use GPS geographic coordinates & ellipsoidal height not orthometric heights in Aerial Triangulation?
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1 answer
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Opening Cities Revealed data from 1990s?

I have been given a lot of aerial imagery from the mid-1990s that is in '.crv' format. The software/company at the time was called 'Cities Revealed'. Does anybody know how I'd go about opening it? ...
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2 answers
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Tiling geocoded aerials in QGIS 2

I have two geocoded aerials from the Las Vegas valley from different years. The newer aerial has an area missing from the Northwest part of town. The older aerial has the missing area I need. My ...
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5 votes
2 answers
3k views

Converting 4-band TIF to PNG while keeping all 4 bands?

I have a number of aerial photos containing both RGB and a near-infrared band. The images are in TIF-format, however I need to convert them to PNG without losing any of the bands. I have tried ...
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Which type of point cloud is more accurate: from airborne LiDAR or aerial photos?

I have been offered two types of point cloud for my 3D Project. The data will be used by the environmental agency in various projects e.g. flood-risk analysis, dyke conservation, and nature ...
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