Frequently Asked Questions

Installation

CRSError: Not a valid EPSG codes: None

As explained in the rasterio FAQ (https://rasterio.readthedocs.io/en/stable/faq.html), rasterio wheels on PyPI include PROJ 7.x and GDAL 3.x.. This can lead to incompatibilities between libraries:

WARNING :: CPLE_AppDefined in PROJ: internal_proj_create_from_database
ERROR 1: PROJ: internal_proj_identify [...] proj.db lacks DATABASE.LAYOUT.VERSION.MAJOR / DATABASE.LAYOUT.VERSION.MINOR metadata. It comes from another PROJ installation.
rasterio.errors.CRSError: Not a valid EPSG codes: None

If GDAL and its dependencies are installed on your computer, we strongly recommend to build rasterio using –no-binary option:

pip install --no-binary rasterio rasterio

Input data

How to create CARS compatible ROI input data with OTB ?

Please, see the section Make input ROI images to generate the ROI input images.

Did you find this error :”The image and the color haven’t the same sizes”?

If do you use Pleaides sensor images, the color image can’t be superimposable on the CARS input image.

Please, see the section Make a simple pan sharpening to make a simple pan sharpening with OTB.

How to generate input images in epipolar geometry from grids ?

To generate the images in epipolar geometry from the grids computed by cars and the original images, one can refer to the Orfeo Toolbox documentation here .

How to make a water mask with gdal on RGBN images?

Please, see the section Make a water mask to make a water mask with OTB.

Output data

How to generate output files overview ?

Considering bulky files, it can be recommended to generate an overview file with GDAL before opening it with QGIS:

gdaladdo -ro -r average dsm.tif 2 4 8 16 32 64