High-resolution ecogeographical variable dataset describing Latvia, 2024

Description:
This dataset contains 538 ecogeographical variables as raster grids with 100 m cell size. Every layer matches template raster grids (CRS, pixel locations, extent, pixels with values), they cover the whole terrestrial territory of Latvia and are consistent with each other. 

Files:

• "HiQBioDiv_EGVs_2024.csv" names ecogeographical variable layers in "HiQBioDiv_EGVlayers_2024.zip";
• "HiQBioDiv_EGVs_2024_README.csv" explains fields in "HiQBioDiv_EGVs_2024.csv";
• "HiQBioDiv_EGVs_FlowChart_2024.png" visualises relationships between ecogeographical variables in "HiQBioDiv_EGVlayers_2024.zip"
• "HiQBioDiv-EGVs_Maps_20251203.pdf" describes EGV creation in detail;
• "HiQBioDiv_EGVlayers_2024.zip" contains geoTiff layers with ecogeographical variables.

EGV layer's naming convention:

{part1}_{part2}_{part3}.tif

• part1 is a name of the group of variables;
• part2 is an abbreviated name of the specific variable;
• part3 is a categorised spatial resolution:
  • "cell" - information from within the cell only;
  • "r500" - a summary of information from an area with 500 m radius around the cell's centre;
  • "r1250" - a summary of information from an area with 1250 m radius around the cell's centre;
  • "r3000" - a summary of information from an area with 3000 m radius around the cell's centre;
  • "r10000" - a summary of information from an area with 10000 m radius around the cell's centre.

File format:
The layers are gridded geoTiff files and can be loaded in any conventional geographical information system (GIS) or analytical programming languages (e.g. R or Python). 

Geographic projection:
We use the LKS-92 / Latvia TM by default for all layers in HiQBioDiv. 

Sourcecode:
Detailed description of geodata used and workflows in production of every layer is available in an online document. Related work is available at the project's GitHub repository.

Versions:
Versions 1.0.1. fixed layernames (sortable, e.g. from "egv_1" to "egv_001"), fixes longnames in English and Latvian, includes a pdf file with layer creation described in details.