InSAR Ground Motion Viewer — Screen Satellite Ground-Movement Data On A Map.

From Product Download To Screening Report, In One File.

The viewer covers the whole InSAR screening chain, from working out which product suits the subject area to the numbers that go in the report:

• Acquisition — calculates the EGMS tiles for an area and fetches them, or searches ASF for Sentinel-1 scenes and submits HyP3 jobs with a stack builder (path/direction pairing, 6–48 day gaps, batch submit).
• Readers — EGMS L2a/L2b/L3 CSV, HyP3 Float32 displacement GeoTIFF (uncompressed, LZW or deflate; strips or tiles; UTM or WGS84), TRE Altamira shapefiles, and the pid, latitude, longitude, mean_velocity, D<YYYYMMDD>… interchange CSV that a MintPy run exports directly.
• Trend analysis — least-squares velocity with slope standard error, Theil–Sen robust option, and an annual-harmonic fit that separates seasonal amplitude from the secular trend; reference point or area subtraction.
• Screening — threshold exceedances grouped into clusters on a metre grid, with a table, map circles and a report section; displacement-at-epoch colour mode with a time slider.
• Assets and sections — GeoJSON structures, alignments or pipelines get per-asset statistics within a search radius; section profiles by chainage along a drawn or imported alignment.
• Coordinate handling — LAEA EPSG:3035 (EGMS), Transverse Mercator / UTM and WGS84 conversions verified against IOGP test points.
• Performance — canvas point layer with screen-space decimation that preserves worst-case points, pooled series storage and worker-thread unzipping.
• Verification table — 19 in-app checks tied to hand-worked normal equations, IOGP projection test points, synthetic harmonic series and known clustering cases, re-run on every load.