VOC ATLAS · EARTH MAPPING STUDY · 18 SEPTEMBER 2026

Bangkok, the river and the coast

The city centre, Chao Phraya bends and estuary share a local geographic chart. Its surrounding context spans roughly 87 × 81 km at the viewer’s nominal scale. The central 36 × 42 km retains finer imagery and mapped occupancy.

What comes from mapping

Copernicus GLO-30 supplies surface heights. These include vegetation and structures; they are not a bare-earth survey. Heights are used at 1×, with approximately 46–47 m sampling in the centre and coarser sampling outside.
EOX Sentinel-2 cloudless imagery, archived 2016 layer, supplies surface appearance under CC BY 4.0. It does not show current construction.
© OpenStreetMap contributors, ODbL. Retrieved roads, water, building footprints and named sites guide occupancy. OpenStreetMap is community mapping, not an official government survey. Most displayed road widths are estimated.

What is interpreted for VOC

A rigid local rotation and translation fit the depicted river corridor and outlet in World Map 2025. Streets and river bends retain their local shape. The printed Bangkok dot is treated as an approximate locator; the fitted centre sits roughly eight original map pixels from it. This is an explicit interpretation, not a surveyed registration.

The mapped river and immediate estuary refine the coarse source drawing. The coast gradually returns to the accepted wider VOC outline between about 24 and 43 nominal kilometres from the outlet. The outer 12 km of the chart blends heights and appearance into the existing world. Those joins are constructed, not measured terrain.

This remains a bounded local study. Wider geographic correspondence, complete settlement coverage, modern imagery and landmark architecture are not established. Grand Palace and Wat Arun site footprints are retained; their buildings have not been reconstructed. Unknown areas are not classified as empty countryside.

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