# Step Four - Converting the Maps into Garmin Format

Similar to the rendering of the Topo data, this process will take some time so don't be surprised if it takes a few hours to completely render the the map. The procedure will create a .img file based upon the the properties that were entered in the Polish map. There are two ways to do this, one is with the GPSMapEdit program, and the other allows you to batch the map rendering so that it can be run when you are not at your computer.

## Method One - Using GPSMapEdit

- Open the Polish mapfile (.mp) with GPSMapEdit.
- Click on the
**File**menu and select the**Export**submenu and finally the**Garmin IMG / cGPSMapper.exe**option. - You will be prompted for a save location, you will want to save the file in a common directory for all your Garmin IMG files. This will make the import
into Mapsource much easier. The filename should default to the name you entered in the Polish Map properties. Click on the
**Save**button to start the render.

## Method Two - Batching the Process

Similar to the Topographic data download, you can use excel to create the command line to render the data. You can then copy and paste these commands into an empty batch file or straight to the command prompt.- Open Excel and enter the Longitudinal Coordinates in increasing half degree increments (ex -78, -77.5, -77). Select the three cells and drag to the right and Excel will fill in the rest. Repeat for the Latitudinal Coordinates starting in Row 2 Column A and enter them in decreasing order (ex. 42, 41.5, 41). Select the three cells and drag down and Excel will fill in the rest. Starting in Row 2 Column B, enter the following formula, =CONCATENATE("""c:\program files\cgpsmapper\cgpsmapper"" ",ABS($A2*100),ABS(B$1*100), ".mp").
- If this is the first time you are running this application you will need to set some defaults:
- Now you can copy and past the forumula to the remaining cells to generate the commands to render additional Polish maps to Garmin IMG format.
- Open a command prompt and change directory to the directory where all the Polish maps are saved.
- Copy all of the calculated command line entries from excel into the command prompt (you must right click in the command prompt and select the
**Paste**option). This will start rendering each map sequentially.

-77.5 | -77 | -76.5 | -76 | -75.5 | |

42 | Formula | Formula | Formula | Formula | Formula |

41.5 | Formula | Formula | Formula | Formula | Formula |

41 | Formula | Formula | Formula | Formula | Formula |

40.5 | Formula | Formula | Formula | Formula | Formula |

40 | Formula | Formula | Formula | Formula | Formula |

The formula should yield a URL similar to:

"c:\program files\cgpsmapper\cgpsmapper" 42007750.mp