CRS and its Nuances
Background
From the documentation of QGIS website,
"Map projections try to portray the surface of the earth, or a portion of the earth, on a flat piece of paper or computer screen. In layman's term, map projections try to transform the earth from its spherical shape (3D) to a planar shape (2D).
A coordinate reference system (CRS) then defines how the two-dimensional, projected map in your GIS relates to real places on the earth. The decision of which map projection and CRS to use depends on the regional extent of the area you want to work in, on the analysis you want to do, and often on the availability of data."
Different CRS used in our projects
| Name | Description |
|---|---|
| EPSG:4326 - WGS84 - World Geodetic System | It is the universal |
| EPSG:6527 - NAD83(2011) / New Jersey (ftUS) | NAD83(2011) / New Jersey (ftUS) - EPSG:6527 |
| EPSG:3857 - WGS 84 / Pseudo-Mercator | CRS is used by Google Maps, OpenStreetMap, Bing, ARCGIS and ESRIWGS 84 / Pseudo-Mercator - Spherical Mercator, Google Maps, OpenStreetMap, Bing, ArcGIS, ESRI - EPSG:3857 |
| EPSG: 4979 | Used by OpenCityMapWGS 84 - EPSG:4979 |