To use a custom image as a map in OziExplorer, you must convert it into a format the software recognizes and create a calibration file (.map) that links pixels to geographic coordinates.
Here is the step-by-step process to convert and calibrate your images. Step 1: Prepare the Image File
OziExplorer works best with specific image formats to save computer memory.
Choose the right format: Convert large images (like TIF or BMP) into PNG or JPG for standard maps.
Use Img2ozf for huge maps: If your image file is massive, use the free Img2ozf utility (available on the OziExplorer website) to convert your image into .ozf4 format. This allows OziExplorer to load maps instantly without draining system RAM. Step 2: Gather Calibration Coordinates
You need known geographic points on your map to calibrate it accurately.
Find at least grid points: Look for latitude/longitude intersections or UTM grid lines printed on your map.
Identify landmarks: If there are no grid lines, find at least 3 to 4 recognizable landmarks (like trail junctions or peaks) and look up their coordinates using Google Earth. Step 3: Import the Image into OziExplorer Open the OziExplorer desktop application. Click File in the top menu. Select Load and Calibrate Map Image.
Choose your prepared image file (PNG, JPG, or BMP) and click Open. Step 4: Configure Map Settings
A setup panel will appear on the right side of the screen. Fill in the Map Setup tab details: Map Name: Type a recognizable name for your map.
Map Datum: Select the correct datum (usually WGS 84 for modern maps or Google Earth data). Using the wrong datum causes alignment shifts.
Map Projection: Select how the map is projected (e.g., Latitude/Longitude or Mercator). Step 5: Calibrate the Points
You must calibrate at least 3 points, though 4 to 9 points provide much better accuracy. Click the Point 1 tab on the setup panel.
Click the exact location on your map image where your first known coordinate is located. A red marker will appear.
Enter the exact Latitude and Longitude (or degrees/minutes) into the fields on the panel.
Click the Point 2 tab, find your second location on the map, and enter those coordinates.
Repeat this process for Point 3 and Point 4. Spread these points out across the map corners rather than bunching them together. Step 6: Save the Calibration File Click the Save button in the Map Setup panel.
Save the file. OziExplorer will create a small text file with a .map extension.
Crucial Rule: Keep the .map file and the original image file (or .ozf4 file) in the same folder. The .map file tells OziExplorer where to find the image and how to stretch it over the globe.
To test your accuracy, move your mouse cursor over the map and check if the coordinates displayed at the bottom of the screen match real-world locations. To help me tailor the next steps, tell me:
What is the source of your map image (e.g., scanned paper map, website screenshot, drone imagery)?
Do you plan to use this map on a PC, Android device, or older GPS unit?
Are you comfortable finding latitude and longitude coordinates, or would you like a guide on that? AI responses may include mistakes. Learn more
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