Home / Tools / SAD 69 → SIRGAS 2000

SAD 69 / Córrego Alegre → SIRGAS 2000

Change the datum of old coordinates using the official IBGE grids. The result shows how far each point moved and the grid accuracy at that place.

Input

System of the original dataSAD 69data before 1996, tied to the classical networkSAD 69/96data from 1996 on, readjusted networkCórrego Alegre 1970-72most Córrego Alegre dataCórrego Alegre 1961old data, from 1961

Transformation direction

Original → SIRGAS 2000SIRGAS 2000 → Original

Points (name, latitude, longitude)

Decimal degrees with a dot, or DMS (use comma or semicolon between fields). One point per line.

Result in SIRGAS 2000

Fill in the data and calculate.

Where the grids come from

IBGE (ProGriD) shift grids, distributed under the CC BY-SA 4.0 license (GeoTIFF conversion by the PROJ-data project). The site loads only the chosen grid (under 400 KB) and interpolates the shift at the point.

Outside the grid area

If a point is outside the covered area, the tool shows an error instead of inventing a number. Then use the UTM ↔ Geographic tool to get plane coordinates. UTM ↔ Geographic