Overview:
Surcote is a QGIS plugin which aims at estimating the spatial extent of an extrem flood from a known flood extent. The plugin is the result of researches made by researchers from Inrae (National Research Institute for Agriculture, Food and the Environment). My contribution to the plugin is the development of pre-processing tools for the geographical data inputs it needs.
In practice, I created a new tab within the plugin where 6 processing functionnalities (see below) are available to the user to pre-process geographical data (both raster and vector layers) before their use in the core of the plugin.
The source code and the last version of the plugin is not yet available. I hope it will be available soon so you can check it out.
In a few words:
- Implementation of both basic and advanced processing algorithms for raster and vector geographical layers.
- Intuitive and reactive graphical user interface.
- Transparent integration to the QGIS software with parallelization of the most computer intensive tasks, progress bar to monitor progress and useful messages (information, warnings and errors) displayed to the user at all steps.
- Implemented processing:
- Creating cross sectional profile of type "line" from "points" (e.g. transform the topographic data produced by surveyor for several lines intersecting the river bed into cross sectional profile lines )
- Creating a virtual (VRT) digital elevation model (DEM) from a folder containing raster layers (DEM data for large areas are typically given as multiple raster layers).
- Creating a DEM from point data (e.g. in the case where very precise elevation data is acquired by a surveyor)
- Merging DEM of different resolutions
- Cutting/clipping vector and raster layers accoring to a spatial extent defined from a vector layer.
- Automatic extension of cross section profile that are too short (e.g. that do not cross the known flood extent).