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Questions tagged [unmanned-aerial-vehicle]

An Unmanned Aerial Vehicle (UAV) or Drone is an aircraft without a human pilot aboard.

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How to batch import geotagged photos into QGIS?

I did some flights with a DJI drone over an area a few kilometers long, and I would like to batch import the hundreds of geotagged photos into QGIS. I have tried the ImportPhotos Plugin but the photos ...
MapDeath's user avatar
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1 answer
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ArcGIS Pro Orthomosaic Workspace empty

I am attempting to process drone imagery in ArcGIS Pro for the first time following this ESRI tutorial. However, after I go through the 'Create an ortho mapping workspace' steps and click the 'Finish' ...
ia200's user avatar
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1 answer
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Creating orthomosaic from UAV image

I was provided with UAV data consists of *.JPG and *aux.xml files. I tried to create an orthomosaic using ArcGIS Pro following this tutorial https://www.youtube.com/watch?v=I_hwOeft0n4&ab_channel=...
Sher's user avatar
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-3 votes
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Which band is which in an RGB image

I have several RGB images of which I made an orthomosaic image. I would like to create a VARI vegetation indice. QGIS shows 4 bands in the raster calculator. Which band is which of the RGB bands? One ...
Gábor Zvara's user avatar
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Moving correctly projected features from ArcGIS Pro to UgCS

Goal: get a 1/10 Nautical Mile radius circular feature (currently in NAD83/CA State Plane VI WKID:2230), in a .kml file, from ArcGIS Pro (3.1) into UgCS mission planning software (4.21.0) as an ...
IAmAPatientBoy's user avatar
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Georeferencing drone image different pitch-values

I am trying to georeference objects on an image. The image has been taking by a drone and I know the drones parameters. Here is my script: from math import radians, cos, sin, asin, atan2, degrees from ...
simonericmoon's user avatar
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29 views

How to apply Empirical Line Method to UAS imagery for radiometric correction

I am correcting/calibrating multispectral UAS imagery using the Empirical Line Method using the raw digital number of 3 color panels (white, 18% grey, black). I found the slope and the intercept of ...
Mon Mo's user avatar
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Low reflectance values

I use DJI P4 multispectral. Here is the command I gave in opendronemap software. –dem-resolution 1.5 --orthophoto-resolution 1.5 –orthophoto-png --dsm –radiometric-calibration camera –texturing-skip-...
SS101's user avatar
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How to align orthomosaics in QGIS?

I have processed about 8 orthomosaics from UAV data collection. They used RTK for georeferencing, but I guess it was not done properly. They did not use GCPs. Therefore, the orthomosaics do not align. ...
Jose Luis Landivar S's user avatar
3 votes
2 answers
229 views

Wrong parameters when georeferencing single drone images

I am using a DJI Mavic 3M drone to capture images from the ground view. DJI provides a guide on how to correct the images for the lens distortion. Each captured image contains XMP metadata about the ...
nmhng's user avatar
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Camera Footprint on ground plane using Quaternion

I am following this thread http://rijesha.com/2018/aerial-cam-footprint/ What I want to do is Plot drone camera footprint on basemap using information utmX,utmY,vFOV,hFOV,camera roll,camera pitch,...
8-DK's user avatar
  • 101
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Is the thermic radiation of humans visible in common UAV NIR cameras?

With a group of students we gathered some UAV imagery containing RGB bands (~490 - 660 nm) and a NIR band (near infrared, ~800 nm) in order to calculate the NDVI with this data. Our start- and landing ...
Honeybear's user avatar
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94 views

Pansharpening Planet multispectral satellite imagery with UAV RGB imagery in ArcGIS Pro

I'm currently attempting to perform a Gram-Schmidt pansharpening algorithm in ArcGIS Pro using PlanetScope multispectral imagery and UAV-based RGB imagery. I am encountering an issue where the ...
Theo Diehl's user avatar
1 vote
0 answers
64 views

Assign CRS for drone imagery

I am importing TIFF imagery from the Phantom 4 Multispectral drone which does not have predefined CRS. When I double click the layer and go into the source tab and select a CRS, it displays over the ...
Jas Singh's user avatar
1 vote
1 answer
80 views

How to apply "direct georeferencing" with PTZ camera?

I have images taken from Mavic 2 drone over the ocean, and the images have been taken with the orientation angle (roll, yaw, pitch) of both drone and gimbal. With these tilted environment, I want to ...
JOEY's user avatar
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How to produce spectral signature using SCP plugin for drone images

The SCP plugin can output spectral signatures of satellite remote sensing imagery. I'm wondering, has anyone tried to use the SCP plugin to output spectral signatures of drone-based imagery (for my ...
Jas Singh's user avatar
3 votes
2 answers
357 views

Problems importing DJI Phantom images into QGIS

I am trying to import DJI Phantom 4 multispectral imagery into QGIS. I have imported the imagery but the images are not in the right location (showing near the coast of Africa when they should be in ...
Jas Singh's user avatar
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804 views

Calculating position of target of drone

We have an dji matricies 300 rtk video. I would like to detect position of something. Here an example photo what I would like to detect. Green rectangle is my target.Black rectangle is mid point of ...
Piko's user avatar
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0 answers
194 views

Calculating latitude and longtitude using yaw degree and distance

I have some drone videos and metadatas. I would like to find latitude and longtitude of center of image, if it is possible any point. To do this, I thought I can use altitude and pitch degree. Because ...
Piko's user avatar
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1 answer
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Find the area of a raster created from drone data

I am trying to find the areas for a series of drone captured mosaic tiff data using ArcMap 10.8 which are irregular in shape. I have tried using Raster Calculator and multiplying by 0 to then use the ...
Karyssa's user avatar
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3 votes
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136 views

Drone photogrammetry - power lines not lining up

We're using a DJI P1 processed in Metashape to create orthophotos. We're having problems with power lines being disconnected. Fences and other long, straight objects that are on the ground are all ...
GlenS's user avatar
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1 vote
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164 views

Removing RTK Correction from Images

I am doing a thesis research and I was supposed to analyze an un-corrected dataset (drone images collected only using GNSS). When I load the images into Agisoft Metashape (professional version 1.8.4 ...
Jose Luis Landivar S's user avatar
2 votes
1 answer
393 views

Merge multiple geo-referenced *,jpg files into a GeoTIFF in QGIS

I have a set of georeferenced *.jpg files from a UAV flight and want to merge them into a GeoTIFF Mosaic. Is it possible in QGIS ?
David's user avatar
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1 vote
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GPS latitude, longitude, elevation, and Total Station's Coordinates - can they be used together?

I have used DGPS to get the coordinates (lat, long) using UTM projection, and elevation (height above ellipsoid) for different points (set a). If I use one of the collected points location to setup ...
srinivas's user avatar
  • 163
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0 answers
131 views

Determine vegetation percentage cover from drone data in QGIS

I'm relatively inexperienced with QGIS. I have a study site where I am testing multiple vegetation removal techniques to reduce fire hazards. I want to collect drone imagery before and 1 year after ...
Brian Allen's user avatar
1 vote
0 answers
95 views

Orthophoto showing image banding along flight lines after reconstruction

I'm currently flying a mapping mission with a DJI P1 with the following flight parameters: Altitude: 250m Side/Forward Overlap: 60/80 Terrain Follow: Enabled RTK: Enabled Regardless of the time of day ...
Naeem117's user avatar
2 votes
0 answers
135 views

Problem with wrong DEM output after georeferencing

My goal is to georeference a DEM tiff file that I have with a reference orthophoto. Steps to reproduce Open orthophoto (EPSG2056) in QGIS Open the DEM (EPSG2056) in the Georeferencer Add GCP (I am ...
tukanium's user avatar
  • 211
1 vote
1 answer
60 views

Determine Lat/Long of "off-center" point of a top-down image

I am a computer science student with a top down photo taken by a drone. This drone has relatively low to zero gimble yaw/pitch (0-10deg), isn't very high up (~15m) in flat lands pretty close to sea ...
slightly drifting's user avatar
1 vote
2 answers
166 views

Bare soil detection using drone images

I'm working with drone images which separated to red, green and blue bands. My task is to determine bare soil pixels. I've tried to swap bands in the composite, and calculate different differences ...
GeoKapor's user avatar
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35 views

Weird issue in orthophoto of canpy in rough terrain

After postprocessing drone imagery of a forest area in rough terrain, I had a weird issue such as in the images below. The effect is like the cropping of trees following the DSM. If you have ...
geogeek's user avatar
  • 4,586
6 votes
1 answer
493 views

Merging drone/photogrammetry-derived DEM and satellite-derived DEM using ArcGIS Pro

I have a DEM that was produced from drone images at a site of interest, processed through Agisoft Metashape. Because I used a drone, the site-level DEM boundaries/edges are irregular rather than ...
ArchArchy's user avatar
  • 121
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0 answers
162 views

Computing drone camera footprint over a DTM

I am developing a Python application to compute the footprint of aerial videos. I am able to compute the footprint when the sensor is parallel to the terrain and the terrain surface is plane. Now, I ...
Domenico Rossi's user avatar
1 vote
0 answers
35 views

Reusing regression or machine learning model in subsequent years

I have collected high-resolution UAV imagery and leaf area index (LAI) plot data. I plan on creating a model which uses my ground-based LAI to establish a relationship or train my UAV imagery. I will ...
low_teach's user avatar
2 votes
1 answer
342 views

Mapping salinity indices to pixel values

I have studied papers related to Soil Salinity indices that include equations such as this paper here. What I try for many days to find out, is how the increase or decrease in a Salinity Index is ...
Steven's user avatar
  • 137
1 vote
1 answer
86 views

Setting Region with Python Loop in GRASS GIS not Updating to include Extent of Multiple Rasters

I am using the Python simple editor in GRASS GIS to write a script that can import multiple raster files into GRASS GIS mapset. The first for loop successfully pulls in the orthophoto and its relevant ...
pbaltezar's user avatar
0 votes
1 answer
149 views

Checking if 2 UAV images have similar NDVI [closed]

I have 2 UAV images showing NDVI of the same plant field from different positions (meaning different coordinates, not different capture angle). I am trying to find a solution in order to compare ...
Steven's user avatar
  • 137
2 votes
1 answer
332 views

Extract information from specific objects on UAV images

I am writing an application in PyQt5 that depicts images with objects inside. For instance houses. I need to check (somehow) the objects on the image and get the pixels’ values on that specific ...
Steven's user avatar
  • 137
0 votes
1 answer
397 views

Can PPK (NOT RTK) be done with any mapping drone?

If PPK is by definition post processed and does not require a live connection to the base-station, why wouldn’t be possible to use any drone and post process the resulting coordinate data (assuming ...
NeoGeo's user avatar
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0 votes
1 answer
364 views

Batch increase drone imagery altitude by editing EXIF GPS information

I have around 3.600 drone images covering an area of around 2 x 4 km. The images were recorded using two drones. For some reason, the photos from one of the drones are off by around 15 meters on the z-...
ragnvald's user avatar
  • 3,191
1 vote
1 answer
270 views

Correcting Drone-DEM data for Mosaicking using ArcGIS Pro

I collected four drone flights for DEM and orthomosaic creation. While all flights overlapped, each of the datasets has different vertical elevation ranges (because of the internal inconsistency). How ...
Bill_BIlliams's user avatar
0 votes
1 answer
977 views

How can I get the channels of a .tiff UAV image and maintain the georeference

So, the idea is that I have a .tif UAV image. I need to get R,G,B,A channels into 4 separate .tif files by maintaining the georeferencing. So, for instance: Red.tif, Green.tif, Blue.tif and Alpha.tif. ...
Steven's user avatar
  • 137
0 votes
1 answer
2k views

SCP Plugin for QGIS 3.16.7 Error 'raster is not loaded'

This is more of a FYI than a question... I'm running SCP (semi automatic classification) 7.10.4 plugin to QGIS 3.16.7 under Windows. I struggled quite a bit with the following roadblock: Create a ...
Eileen Perry's user avatar
1 vote
0 answers
274 views

Given a point (x,y,z) and an angle/bearing distance calculate the end point (x,y,z) in python

I am trying to figure how to correctly code this. Imagine a camera is on a gimble against a 10 ft high drone. Old vector: {'X': 39.375346, 'Y': 10.0, 'Z': -84.208137} new vector: (30.130935697561846, ...
Adam Mohammed Dabdoub's user avatar
1 vote
0 answers
173 views

Problems with segmentation of Orfeo Toolbox

I'm new to Orfeo ToolBox, and I started using the segmentation tool with an RGB orthomosaic from UAV in order to classify the different units. The result gives me a clear result with vegetation but ...
María Victoria Brizio's user avatar
0 votes
0 answers
137 views

Separating (grouping) different crop types that are phenologically the same

I have a bean farm plants UAV images, but they are different crop types, and others that are phenological the same. Can I cluster the plant fields using the UAV images? I cannot figure out from the ...
Steven's user avatar
  • 137
0 votes
2 answers
3k views

Mapping image from drone in QGIS

Is it possible to map a drone image JPEG directly over a QGIS project as a layer or is it necessary to make some post processing, because it's not rendered on it's correct position?
Pepe N O's user avatar
  • 666
1 vote
3 answers
326 views

Creating maps in QGIS from Drone Videos

If it is possible to create maps in QGIS from Drone Videos, then how do I do it? I've found software like DroneDeploy but QGIS being so long in this race, I feel more reliable. I have drone video ...
bhushan11's user avatar
0 votes
0 answers
166 views

Problems with tree height in CHM

I did a drone flight over a forest plantation and got the DSM and DTM. Later, I was interested in calculating the height of the trees within a plot. For this, I did a subtraction between the DSM and ...
Javier Hernández's user avatar
2 votes
0 answers
284 views

Calculating the coordinates of the selected pixel point from an image with known corner coordinates

How can I calculate the coordinates of the point(P) we want from an image with known corner coordinates? I want to find out respective coordinates from the selected the pixel of the image obtained ...
Gazi Yılmaz's user avatar
0 votes
1 answer
499 views

Conversion of UAV DN values to reflectance

My aim is to carry out fusion between Sentinel 2 and UAV images. Sentinel images are already converted to reflectance values but UAV images are in DN number format. How can I convert UAV DN values to ...
Rahul T S's user avatar