HEC-RAS 2D DATA IMPORT

[tngv751]

I want to create 2d hecras flood modelling around a property in Australia. I have no problem for doing 1D.
In order to do 2D Hecras, you need to import a Ras map or terrain data and then create mesh and geometry.
But I don't know how to get which data to import. You can go website

https://spatialreference.org/ref/epsg

? and which map ? WHICH FILE ?
Thanks

 

[Ekenny_G]

For HEC-RAS 2D, are you asking about Projections to use for your project location (Australia).....?

The link you included appears to point to EPSG, which are projection files to assign coordinate systems.
For Australia, you will need to know which zone your project is located. Australia has multiples zones ranging from AMG ZONE 51 TO 56.
Use this link to find which one to use:

https://epsg.io

Otherwise, if you have a GIS shapefile, look for the .PRJ file associated with the arcGIS shapefile for your project area, then import that for your RAS mapper.