Questions tagged [pix4d]

Pix4D is a commercial photogrammetry software.

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Fitting a grid to a research plot

I am trying to create a grid to use for zonal stats for a ag research plot. I have created some grids and rotated them and am getting decent fittings but I feel that there must be some other better ...
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Combining a vector layer with a Raster layer Geotiff orthomosaic and contour/Shp file

I am attempting to do the same as @shub but when I do the above process "Bring in a shapefile of your contours and make sure they have an elevation attribute with them. Go to Raster > Conversion > ...
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25 views

Making Shapefile Hybrid Micro-Plot Boundary?

We would like to analyze in the field of precision agriculture the performance of a lot of hybrids that are planted in lines with no border between them. For this we need to make boundary or a border ...
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46 views

Radiometrically correct one UAV image

Does anyone out there know how to perform radiometric corrections on a single image taken with a multispectral sensor? I know there is proprietary software (such as PiX4D) that can do this; however, ...
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41 views

Is it possible to rotate about a point with a .prj file?

I'm aiming to create a .prj file to use within Pix4d so that the output is in a local grid. I have the following information to assist: Conversion MGA94(AHD) to Grid This conversion involves both a ...
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174 views

Change coordinate system of image exif data

I just started using Pix4D mapper and straight away ran into the problem that the flight data is in WGS 84 and the GCPs are in Gauss Krüger 3. The pix4d support suggested to Transform the image ...
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188 views

Pix4D and ODM generated tiff with same source images not aligning?

I have created two georeferenced orthomosaics using dronemade images. I used OpenDroneMap and Pix4D for that and I used the same source images for both. I thought that if I used the same images, the ...
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1answer
73 views

Smooth mosaicking of smaller orthomosaics to form a homogenous mosaic

This image below is generated using Erdas Imagine where I used mosaicpro tool to create a super mosaic of orthomosaics generated using PIX4d I used following options: Color Balancing Color Dodging ...
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55 views

Why reflectance map in pix4d dont are normalized

I want to know, why my reflectance map, dont have value between 0 and 1. Because my calibration table said me: for example red band has max value = 0.88 nm, and my reflectance map in red band have max ...
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76 views

Processing drone Images of body of water?

I took some pictures of a body of a body of water using a multi-spectral sensor attached to drone. When trying to process the image using Pix4D, more than 50% of pictures were unable to calibrated. ...
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103 views

pix4d vertical coordinates

I've been given Ground control points for job and the vertical co-ordinates are in AHD (Australian Height Datum). Does anyone out there have any idea how to transform vertical heights in AHD to Pix4d ...
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1answer
2k views

Pix4D vs. Agisoft Photoscan

How do Pix4D and Agisoft Photoscan mechanically differ in producing an orthomosaic, given the same set of geotagged images? Are they any resources that discussed this? I'm also assuming full ...
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78 views

Obtain reflectance map in pix4d?

I can not obtain my reflectance map in pix4D. The program said: Unable to computed radiometric calibraticon from sequoia. Unable to computed coordinated system. Its rare, because normally i ...
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91 views

Pix4D Initial process merge looks exploded on one end

I have a 3700+ image project that has been merged from 9 separate projects. After the final merge, one end of the property looks like it exploded from the ground. If I click on the pixels they show up ...
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104 views

Can NIR minus Red be used instead of NDVI with Drone Imagery

I have some CIR imagery collected by a vendor using a Cannon Powershot S110 NIR, from an eBee fixed wing platform, about 400 ft AGL. All images were stitched together by the vendor in Pix4D. I want to ...
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1answer
260 views

Why do UAV-derived NDVI values fall far outside -1 to 1 range after empirical line calibration?

This question was marked as being a duplicate of Landsat8 NDVI values not in the -1 to 1 range but I've posted my question because: I am not using Landsat; and there was no explanation of how to ...
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1answer
1k views

Is there a way to view Pix4D outputs in an intractable web viewer?

I have a small area that I created a 3D Triangle Mesh for. I want to be able to use the output files and view them on a browser rather than in the program so it's easier to share with others. I've ...
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1answer
899 views

Measuring volume using DSM instead of point clouds in Pix4D

I've go a point cloud generated in the Pix4D software from about 90 aerial images. I am trying to measure piles of coal and have found that using the volume measuring tool on the point cloud model ...
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443 views

Setting elevation data for tie points in Pix4D

I am currently working in Pix4D and am trying to assign elevation data to my selected tie points. I have aerial images taken using a camera with GPS from an aircraft and am working with a fairly ...
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303 views

Reset a base elevation in Pix4D?

Does anyone know how to set a baseline elevation in Pix4D, or is that something that has to happen on the drone-capturing side? The reason is that I have an area which is flown with LiDAR, several ...