Data Specifications and Limits
This page describes specifications and limitations for vector and raster data uploaded to Kumoy. For upload steps, see Upload Vectors and Rasters.
Vector Specifications#
Supported Data#
Kumoy supports vector data that can be added to QGIS. The following conversions are applied during upload:
| Item | Specification |
|---|---|
| Geometry | POINT / LINESTRING / POLYGON (multi-part geometries are converted to single-part) |
| CRS | Automatically converted to EPSG:4326 |
| Attribute data type | Integer, float, string, and boolean (columns of other types are converted to string where possible) |
Upload Limits#
- The maximum feature count is 1,000,000.
- The maximum attribute count is 100.
An error message appears if you try to upload a vector layer that exceeds these limits.
Data Accuracy#
To optimize vector data for the web, Kumoy converts it to a standard coordinate system (EPSG:4326 / WGS84). For most business use, the converted data offers enough accuracy for viewing and sharing maps.
If your work requires strict accuracy or full reversibility to the source data, verify the result before relying on the uploaded data.
Raster Specifications#
Supported Data#
Kumoy supports raster data that can be added to QGIS.
Uploaded raster data is automatically converted to COG (Cloud Optimized GeoTIFF) inside Kumoy. You do not need to convert it to COG beforehand.
Upload Limits#
- The maximum size is 4 GB per file.
- Kumoy uses the CRS (coordinate reference system) assigned to the source data. If no CRS is assigned, set the correct CRS in QGIS before uploading.
QGIS Processing Considerations#
Kumoy rasters are handled through a custom provider in QGIS.
- Native QGIS processing algorithms can be used.
- GDAL processing algorithms cannot operate directly on Kumoy rasters.
To use a GDAL processing algorithm, first export the Kumoy raster to a local file, then use that file as the input.
Last update: Jul 27, 2026 11:35:19