Terrain Navigator Pro uses very sophisticated methods to "stitch" photos together so that each individual photo appears seamless, even when the original photos do not match the zone in which the photo has been projected. One unfortunate byproduct of these calculations is that when the scale of the photo is altered, a grid-like pattern can appear embedded into the image.
Here are some steps to minimize (or eliminate) this phenomenon when printing:
1. First, be sure you are running the latest version of Terrain Navigator Pro. Some earlier versions of Terrain Navigator Pro exhibited this issue more profoundly than later versions. It is our goal to eliminate this grid-like pattern completely as we continue to revise and improve Terrain Navigator Pro.
2. Be sure your video and printer drivers are up to date. Some drivers can add additional artifacts that will accentuate the grid-like pattern. Please see this knowledge base article for more details.
3. In the Printer/File tab, try selecting the 'Image on PC' next to the Options button. We have observed that certain PDF software packages can add lines across the photos, in a similar way. Setting the Image on PC option will usually eliminate these additional lines. (However, some printers do not support this feature.)
4. When printing the aerial photo, do not change the scale (in the Properties tab for the Map Page Block) beyond the original size of the photo. Most photos are 1:12,000 scale. By maintaining the original scale, the reprojection algorithm does not have to resize the aerial photo, and the grid-like pattern will be eliminated. Unfortunately, this does limit the size of the photo to the printed page area. However, in the Pages tab, you can specify additional pages for the area to be wider or taller (or both.) While this will yield additional map pages (that can be fastened together) it will also provide the highest quality reproduction of the aerial photo possible.
Here's how to eliminate the issue when exporting the aerial photo as an image:
When exporting the aerial photo as a JPG or other image, again refrain from resizing the photo beyond its original scale and DPI. As with printing, do not change the scale (in the Properties tab for the Map Page Block) beyond the original size of the photo. However, you can accommodate for additional area in your final image.
Whenever exporting a map or aerial photo, it is usually best to start with the 'Map Only' template available in the Templates tab. This provides the maximum space for the photo, without the need for margins, a scale bar, etc. (If you want these, you can always add them back using the Properties tab inserting additional page blocks.)
In the Printer/File tab, set the DPI to 306. This is the actual DPI of the photo; changing it will ensure the quality of the photo is maintained throughout the export process.
Once the DPI has been set to 306, increase (or decrease) the dimensions (in either inches or pixels) of the final image until you have the desired area in the preview window. (As with DPI, the dimensions are set in the Printer/File tab.) Now you will be guaranteed the best quality for your final photo, and the grid-like pattern will not be present.
If the resulting image is too large, use an image editing application (like Adobe Photoshop, or similar products) to resize the image to the desired dimensions. Because the image has already been fully rendered, there will be no artifacts when the image is resized.