SATHI
SATHI: Spatial Aggregation, Temporal Harmonization & Interpolation for geometry-aware climate-grid extraction, spatial statistics, interpolation and daily-to-seasonal harmonization.
SATHI (Spatial Aggregation, Temporal Harmonization & Interpolation) is a QGIS climate-grid processing plugin for Raster/NetCDF, Vector Layer and CSV inputs. It supports nearest-neighbour and bilinear interpolation, Point/Line/Polygon Spatial Mean and geometry-weighted Mean, automatic field/NetCDF variable detection, leap-year-aware Daily/Weekly/Monthly/Seasonal harmonization, rainfall SUM and temperature MEAN rules, NoData exclusion, and AOI-wise wide CSV outputs. SATHI v1.9.7 groups year-wise NetCDF and CSV folder inputs by climate variable: TMAX, TMIN, Rainfall and similar variables each produce one multi-year CSV per selected temporal period, with one row per year. First-level variable subfolders such as TMAX/2020.nc are recognized automatically. Rainfall groups use SUM and temperature groups use MEAN in Auto mode. TIFF/IMG raster folders and Vector Layer folders remain source-separated, and raster pixel-overlay mode remains one CSV per raster source. The Grid input type label is Vector Layer. SATHI v1.9.5 added a raster-vector pixel overlay mode containing every valid intersecting raster pixel with Latitude, Longitude, PixelValue and per-group Min/Max/Mean/Sum statistics. SATHI v1.9.4 adds native GDAL multidimensional NetCDF reading of TIME/LATITUDE/LONGITUDE coordinates and an IMD 0.25-degree documented-grid fallback when classic raster sampling returns no valid pixels. SATHI v1.9.3 added explicit raster Time/Date and Pixel Value handling for TIFF/IMG and other rasters: dates are detected from filenames or per-band metadata, raster pixel values are sampled directly, and Auto band selection distinguishes true dated time stacks from ordinary multiband imagery. SATHI v1.9.2 added robust NetCDF date-axis decoding and GDAL-direct fallback sampling so valid climate stacks are not lost when the QGIS raster provider returns empty samples. SATHI v1.9.1 added a responsive, resizable popup layout with scrollable controls, adaptive branding, flexible processing/output controls and a responsive Help window. SATHI v1.9.0 added expanded raster file/folder support, QGIS-provider file filters, and Point, Line and Polygon AOI processing. Polygon weighted means use overlap area, Line weighted means use intersection length, and Point AOIs use containing/nearest grid cells. One-decimal output formatting, interactive logo/help, climate aggregation rules and wide CSV outputs are retained.