EPSG:4674 — SIRGAS 2000
SIRGAS 2000 — the official geodetic datum for Latin America since 2005.
PROJ definition
+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
Geographic bounds
W -122.19° S -59.87° E -25.28° N 32.72°
Convert coordinates with EPSG:4674
Official EPSG transformations for SIRGAS 2000
Datum transformations involving EPSG:4674 published in the EPSG dataset, with parameters, accuracy and area of use:
- Aratu → SIRGAS 2000±0.5 m
- Chua → SIRGAS 2000±5 m
- Corrego Alegre 1961 → SIRGAS 2000±2 m
- Corrego Alegre 1970-72 → SIRGAS 2000±2 m
- POSGAR 2007 → SIRGAS 2000±0.1 m
- SAD69 → SIRGAS 2000±1 m
- SAD69(96) → SIRGAS 2000±0.5 m
- SIRGAS 1995 → SIRGAS 2000±0.006 m
- SIRGAS 2000 → SIRGAS-CON SIR17P01±0.02 m
- SIRGAS 2000 → WGS 84±1 m
About EPSG:4674
EPSG:4674 is the Sistema de Referencia Geocéntrico para las Américas 2000 (SIRGAS 2000), aligned with ITRF2000 at epoch 2000.4 on the GRS 80 ellipsoid. Adopted by IBGE in Brazil in 2005 and progressively by other Latin American national mapping agencies, it provides a continent-wide compatible reference frame replacing legacy datums like Córrego Alegre, SAD69 and PSAD56.
SIRGAS 2000 is the basis for the Brazilian national CRS and projected CRSs SIRGAS 2000 / UTM zones 17S-25S (EPSG:31977-31985), the SIRGAS 2000 Albers (EPSG:5641) used for IBGE thematic maps, and the SIRGAS 2000 / Brazil Polyconic (EPSG:5880) used in legacy nationwide products.
Common use cases
- Brazilian federal mapping (IBGE)
- Latin-American cross-border GIS data exchange
- GNSS surveying in South America
- Migrating legacy SAD69 / Córrego Alegre data
Common transformations from EPSG:4674
- EPSG:4674 → EPSG:4326SIRGAS 2000 → WGS 84
- EPSG:4674 → EPSG:3857SIRGAS 2000 → WGS 84 / Pseudo-Mercator
- EPSG:4674 → EPSG:3395SIRGAS 2000 → WGS 84 / World Mercator
- EPSG:4674 → EPSG:4978SIRGAS 2000 → WGS 84
- EPSG:4674 → EPSG:7789SIRGAS 2000 → ITRF2014
- EPSG:4674 → EPSG:4267SIRGAS 2000 → NAD27
- EPSG:4674 → EPSG:4269SIRGAS 2000 → NAD83
- EPSG:4674 → EPSG:6318SIRGAS 2000 → NAD83(2011)
- EPSG:4674 → EPSG:4322SIRGAS 2000 → WGS 72
- EPSG:4674 → EPSG:26910SIRGAS 2000 → NAD83 / UTM zone 10N
- EPSG:4674 → EPSG:26911SIRGAS 2000 → NAD83 / UTM zone 11N
- EPSG:4674 → EPSG:26912SIRGAS 2000 → NAD83 / UTM zone 12N
Frequently asked questions
- Is SIRGAS 2000 compatible with WGS 84?
- Yes — to within a few centimetres at modern epochs. SIRGAS 2000 is aligned with ITRF2000 and tracks the South American plate; WGS 84 tracks ITRF globally. For sub-decimetre work in surveying use a published Helmert transformation against the specific WGS 84 realisation.
- What is the proj4 string for EPSG:4674?
- The proj4 definition for EPSG:4674 is: +proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
- Where is EPSG:4674 used?
- EPSG:4674 (SIRGAS 2000) is defined for the area: Latin America - SIRGAS 2000 by country.