Hi Derringer68,
Maps are generated on the dedicated server by using the servercfg.xml. You would want to make sure you update the following settings:
<!-- GAMEPLAY -->
<!-- World -->
<property name="GameWorld" value="Navezgane"/> <!-- "RWG" (see WorldGenSeed and WorldGenSize options below) or any already existing world name in the Worlds folder (currently shipping with e.g. "Navezgane", "Pregen04kA", "Pregen04kB", "Pregen04kC", "Pregen04kD", "Pregen06kA", "Pregen06kB", "Pregen06kC", "Pregen06kD", "Pregen08kA", "Pregen08kB", "Pregen08kC", "Pregen08kD", "Pregen10kA", "Pregen10kB", "Pregen10kC", "Pregen10kD", ...) -->
<property name="WorldGenSeed" value="asdf"/> <!-- If RWG this is the seed for the generation of the new world. If a world with the resulting name already exists it will simply load it -->
<property name="WorldGenSize" value="6144"/> <!-- If RWG, this controls the width and height of the created world. Officially supported sizes are between 6144 and 10240 and must be a multiple of 2048, e.g. 6144, 8192, 10240. -->
<property name="GameName" value="My Game"/> <!-- Whatever you want the game name to be (allowed [A-Za-z0-9_-. ]). This affects the save game name as well as the seed used when placing decoration (trees etc) in the world. It does not control the generic layout of the world if creating an RWG world -->
<property name="GameMode" value="GameModeSurvival"/> <!-- GameModeSurvival -->
If you decide to generate the map locally and FTP it to your server, you will want to make sure you update the server config with the same information. If you leave the server cfg as default, it will generate another map based on the default info.
Hope this helps.