Explain to me how you do this.... I go to Google Maps, and then how do I make a Snip of the size 720 x 720 ? Is there a measuring tool on maps I can use ( in metric ) ? I looked and I can't see anything like that.
Please explain this to me like the simpleton I am ! Thanks !!
Look for Basemap assets on the DLS.
These are called Basemap A, Basemap B, etc.
Each of these is 720 x 720 meters.
You clone a Basemap object such as Basemap A, for example.
Change the TGA image already there into your map image. It's best to keep the same name so it's easier to do.
Close the asset and submit.
Repeat for Basemap B asset, follwed by Basemap, C, D, E, etc., until you have enough images for your needs.
You then place the assets and shift them a hair down under the mesh, and lock them on a layer such as basemaps for example. We're lucky we have layers now, which didn't exist back in the early days.
Once locked, and just below the surface, use the grid view and place your assets over the basemap object with the map image on it.
This is a long process when you have a lot of images and gets tiring very quickly.
With Trans DEM you can do this all in one shot and as GeoPhil says, the maps can be merged with others with similar geo-data because everything is referenced on the real UTM grid. As he says, using the built-in Map-Tile information works very quickly with with obtaining orthographic images. There are other sources besides Google such as Microsoft and ESRI, which by-the-way, use similar information.
My recommendation is go through the part of the tutorial for obtaining maps. The gist is download a single overview map first. Draw a poly line next, and then for your tiles you then use images along a path. I put together a quick guide, which I can send you a link to. PM me and I'll get it for you. There are some things out of date such as obtaining the DEM data due to the interface changing about 20 times in the past 3 years, but all the rest is the same.