EPSG:CODE

NAD27(CGQ77) to NAD83(CSRS) (1)

EPSG:4609 → EPSG:4617

Deprecated

Coordinate Reference Systems

Source CRS
EPSG:4609
NAD27(CGQ77)
Geographic 2D
Target CRS
EPSG:4617
NAD83(CSRS)
Geographic 2D

Remarks

Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27(CGQ77) (code 4609) and NAD83(CSRS) (code 4617) have longitudes positive east. Can be taken as an approximate transformation NAD27(CGQ77) to WGS 84 - see code 1691.

Frequently Asked Questions

What is the accuracy of the NAD27(CGQ77) to NAD83(CSRS) transformation?

This transformation (EPSG:1845) has an accuracy of 1.5m using the NTv2 method. Area of use: Canada - Quebec.