From contributions to connectivity insight.
Public data / voluntary measurements → validation → private storage → spatial aggregation → connectivity metrics → interpretation → Web GIS.
Public edition
This site reads a static export generated on 7 October 2026. Data preparation and spatial assignment were performed in PostGIS before publication; filters and performance screening run on the published aggregates. New contributions are disabled. Ookla observations cover 2025 Q1; population years cover 2020–2025. A snapshot export date is not a source observation date.
Coordinates & spatial operations
Measurements use WGS84 geography in PostGIS. Grid aggregation uses UTM zone 47N (EPSG:32647), with a fixed 1,000 metre grid. Nearby analysis uses ST_DWithin on cell centroids; district assignment uses ST_Covers.
Privacy & consent
Raw coordinates stay server-side. Public cells require at least 3 consenting measurements; each metric also requires 3 non-null observations. Cells with fewer than 10 samples are marked as limited. This threshold reduces exposure but is not a formal anonymity guarantee.
Interpreting performance
Crowdsourced cells show medians. External Ookla tiles contain means and test/device counts, and must be interpreted separately. Missing values remain null. A blank map means insufficient evidence, not absent internet service.
Analytical thresholds
NetMap download classes: Very Low below 10 Mbps; Low 10–30; Moderate 30–100; Good 100–300; High 300 or above. These are exploratory choices, not official standards. Low-connectivity analysis accepts a custom threshold.
Limitations
- Voluntary samples have geographic and participation bias.
- Performance varies with time, device, plan, congestion and test method.
- Grid boundaries and administrative aggregation affect interpretation.
- Repeated submissions can come from one person; sample count is not a count of independent users.
- Maps describe sampled performance and do not establish causes of digital inequality.
Research roadmap
Population exposure, temporal analysis and the experimental NetMap Digital Connectivity Index require further data and validation. They are not presented as completed analyses.