DEMNAS | National DEM

National DEM (DEMNAS)

Free

Provider: Badan Informasi Geospasial (BIG), Indonesia
Release Year: 2018 (latest version may vary)
Purpose: Standardized national-scale elevation model for geospatial analysis, development planning, and disaster mitigation

Specification

Coverage Area : Entire land area of Indonesia (excluding small offshore islands < 5 ha)

Spatial Resolution : 0.27 arc-second (~8.25 meters at the equator)

Vertical Accuracy : ±1 meter (flat terrain), ±2–3 meters (hilly/mountainous areas)

Horizontal Datum : WGS 84 (EPSG:4326)

Vertical Datum : EGM2008 geoid

Elevation Units : Meters above mean sea level

Data Type : 16 bit signed integer

File Format : GeoTIFF

Tile Size : 1° x 1°

Source Data : Interferometric processing of ALOS PALSAR (L-band) data, SRTM and LiDAR (for selected areas)

Void Filling : Integrated using SRTM 1 arc-second and manual interpolation

Update Frequency : Periodic, subject to availability of new remote sensing data

Access / Licensing : Free and open via tanahair.indonesia.go.id