G25 Genetic Mapper

Place reference populations, choose a source, and render a genetic-distance or admixture surface clipped to land.

Mode

Distance from the selected source population to each placed reference population.

Map

Water color

Water color applies to both the live map and exports. Terrain relief is fetched fresh for export too, and may take a moment.

Target

Paste one or more G25 lines — Name,c1,c2,…,c25

No target set

Reference populations 0

Paste one or more G25 lines (one per population)

New pins drop near the map center — drag each one onto its real-world location.

No reference populations yet.

Click a name to rename it. Icons: 👁 hide/show pin · ✎ rename · ⧉ copy G25 line · ⊙ pan to pin · ✕ remove.

Show population pins & labels

Pin label size

10px

Presets

Color scale

Auto-fit min/max to data

Min distance

Max distance

Color scheme Gradient opacity

86%

Interpolation power (IDW)

Render quality Smoothing

0px

Softens the interpolated surface further, independent of power. Useful with many densely-packed populations.

After generating the map, moving around or zooming in/out might cause lag in "Balanced" and "Detailed" rendering quality. To avoid this, clicking on "Clear map" is recommended.

Export

Resolution

Include population pins

Include legend

Include source/target name in legend

Include terrain relief

Terrain opacity

55%

Include country/subnational borders

Border opacity

60%

Renders the current map view as a crisp vector-based image — land is redrawn from the embedded coastline data, so it scales without blur at any resolution. Terrain relief is fetched fresh for export and may take a moment, or may not be available for every viewport.

Add reference populations, set a source, then generate.