This tool allows to convert an las (ASPRS)_ file into a uv3 file. It allows to switch through different extraction switches to obtain the colors, the classification or the intensities of the model stored in las format.
Considering a las file containing a model with RGB colors, the following command allows to convert the las file into a color uv3 file :
./dalai-las-uv3 -i /path/to/file.las -o /path/to/converted.uv3 --color
The --color switch indicates the process to consider the las RGB colors during the conversion. The colors have to be available and in the correct format (16 bits) in the input file. The following command :
./dalai-las-uv3 -i /path/to/file.las -o /path/to/converted.uv3 --intensity
allows to create an uv3 file with colors corresponding to the las model intensities. Finally, the following command :
./dalai-las-uv3 -i /path/to/file.las -o /path/to/converted.uv3 --classification
allows to create an uv3 file with colors corresponding to the las model classification. A default color mapping is used to assign a color to each class. If no extraction switch is provided, the classification switch is considered by default. In case multiple extraction switch are specified, only the first one is considered.
The following images give an illustration of the conversion of two las files : the left image showing the result of the classification switch when the right one shows the result of the intensities switch :
Conversion using classification (left) and intensities (right) - Data : SITG and New York City (US-GOV)
In some cases, the las color information or intensities can be coded in way that are not understood by this tool. In such case, unexpected results can occur.