Questions tagged [aerial-photography]
Photographs taken from an airplane or another aircraft within the Earth's atmosphere.
135
questions
-1
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1answer
33 views
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?
0
votes
1answer
69 views
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 ...
4
votes
1answer
71 views
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 ...
0
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0answers
28 views
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 ...
0
votes
2answers
49 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 ...
1
vote
0answers
32 views
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 ...
0
votes
1answer
123 views
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 ...
1
vote
0answers
48 views
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 = ...
0
votes
2answers
51 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 ...
3
votes
1answer
212 views
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?
0
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0answers
21 views
Calculate canopy openness using RGB mosaic from UAV orthorectified aerial images
Canopy openness of trees was obtained easily from digital photographs processed with Gap Light Analyzer. Image processing involves the transformation of image by the division of pixel intensities into ...
0
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0answers
101 views
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, ...
3
votes
0answers
126 views
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 ...
2
votes
0answers
116 views
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 ...
1
vote
1answer
62 views
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?
2
votes
0answers
58 views
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-...
0
votes
1answer
125 views
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 ...
1
vote
0answers
26 views
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.
2
votes
0answers
33 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 ...
1
vote
0answers
27 views
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....
3
votes
3answers
48 views
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 ...
1
vote
0answers
52 views
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 ...
1
vote
1answer
656 views
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 ...
2
votes
2answers
86 views
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 ...
2
votes
1answer
96 views
Aerial Triangulation by using GPS height
Is it possible to use GPS geographic coordinates & ellipsoidal height not orthometric heights in Aerial Triangulation?
1
vote
1answer
70 views
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?
...
1
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0answers
66 views
How to correct bad georeference data in a raster? [duplicate]
I'm doing a bit of vegetation mapping and
I'm relatively new to GIS.
My issue is that the aerial photographs I have are georeferenced with world files (.jpgw) but they are ever-so-slightly off. The ...
2
votes
1answer
58 views
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 ...
4
votes
2answers
2k 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 ...
0
votes
1answer
357 views
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 ...
1
vote
1answer
169 views
Processing historic aerial imagery mosaics
I'd like to process multiple sets of old (>1938) aerial imagery that are scanned, but whether merged nor georeferenced. While I had good results with QGIS to align single photos, using passpoints, ...
2
votes
0answers
31 views
Camera reports database online to look it up?
I received tons of aerial photos that go back to 1930's and I have the information about the camera number and lens number and focal length. They were taken in a picture of the roll that tells us what ...
1
vote
0answers
2k views
export an aerial image to .SID file and a .Tiff file
I am using arcmap 10.4.1 ( also have PRO 2.0 is this is an valid option)
I have an aerial image that was broken down to small grids and need to export each grid to a .sid file and a .tiff file. I ...
4
votes
1answer
2k views
Finding source of Google Earth imagery
Zooming around Northern California on Google Earth reveals that Google have extremely high resolution imagery for not just cities but also rural and wilderness areas. I would guess it's something ...
3
votes
2answers
306 views
Performing aerial triangulation on scanned aerial photos without having surveyed ground control points (GCPs)?
I have a set of 1200 historical aerial photos covering North Carolina outer banks area from 1974, 1984 and 1992. I need to georeference them and produce seamless color balanced dataset that will be ...
2
votes
3answers
72 views
How many forest clear cuts and how big are they?
I have forest stand characteristic data from northern Sweden. We have interpreted multiple years of aerial photos and now have polygons outlining different forest stand ages over time (e.g. clear cuts,...
3
votes
1answer
86 views
Distortion at the edges of the planetscope images
Good morning, does anyone know of a document that explains the distortion on the edges of some planetscope images? Do you know why this happens?
0
votes
1answer
148 views
Creating a raster mosaic from multiple un-referenced jpegs
I have multiple historical aerial photographs that I would like to use to compare coastal change over time in relation to urban development. The aerials I have obtained come in tiles that are not ...
2
votes
1answer
2k views
Merging a vector layer with a Raster layer
I have a Tiff file that has an aerial view and also a shapefile which has contours of the same area. How can I put the contours in the tiff file so that you can view the TIFF and see them both in one ...
0
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0answers
75 views
Drawing of building outlines (rooftops) based on low resolution aerial images
Google maps provides street and rooftop maps from corresponding aerial imagery, but not for all places.
Please is there a method or available software to help outline rooftops from a set of map-tiles,...
1
vote
0answers
73 views
Make images/PDFs in QGIS from Vector Layers [closed]
I have a bunch of vector layers and a few polygons that I want to use to create a image out of while having my image in the background of an aerial photo. I am unsure what commands to use to ...
1
vote
2answers
49 views
Where water will be on a mudflat as tide comes in/goes out?
My study area is large intertidal mudflat in NE England. I want know where the water will be depending on tide height. The attached shows an aerial of my study area. I've photoshopped in the blue ...
6
votes
2answers
1k views
Using Custom Aerial Raster Imagery with OpenLayers 3 or 4
Currently, openlayers supports bing maps, however this is not an ideal option for a commercial application. What would be ideal is to have the ability to host and serve ariel imagery like NASA blue ...
1
vote
1answer
639 views
Can USGS High Resolution Orthoimagery be viewed online?
I found the USGS EarthExplorer where one can download their High Resolution Orthoimagery. This imagery can also be previewed in the EarthExplorer once a particular tile is found, but I wonder if there ...
9
votes
1answer
2k views
Examples of GIS or Remote Sensing in movies
Looking for examples where GIS or RS has been a part of a movie plot. I'm trying to put together a "GIS & RS and the Cinema" class, in which examples of GIS & RS are shown. Those examples will ...
4
votes
3answers
146 views
Interactively deleting tiles of aerial photographs using ArcGIS Desktop?
I have a bunch of separated aerial photographs (res. 20 cm, count ~ 50, total size 20GB) stored in single folder. I do not have a reference polygon layer noting the extent and name of each title ...
1
vote
0answers
96 views
How to align 3D contour file, aerial imagery and design drawings from engineers in microstation v8i series 3.
I am looking to align a 3D contour dgn file with the design drawings from an engineer in microstation.
Then align an orthorectified aerial image (Scale 1:10 000) to the contour file and design ...
3
votes
1answer
128 views
Interpretation of historical aerial imagery
I've been having to look at historical aerial imagery with my job as of late. The goal is to identify and describe historic land use of the sites. Specifically, I've come across sites that were ...
8
votes
2answers
18k views
Difference between irradiance and radiance, remote sensing reflectance and water leaving radiance
I've been trying to lay my hands on textbooks, etc, that explain the differences between the remote sensing terms in lay man language.
radiance and irradiance
remote sensing reflectance and water ...
5
votes
2answers
121 views
Knowing the pixel size for a raster before it was resampled
Is there a method to know the exact pixel size (the original size) of a raster “aerial photo”?
I have purchased an Arial photo with 10 cm pixel size resolution, and I received a sample of it, but ...
