Thread: Converting JNX to raster IMG

Originally Posted by Swall

Sure. One technical question, if I may. Early you'd said that 36 seems the most suitable value for the MapSeries parameter for raster maps. But the map product I'd mentioned uses 23 instead (assuming the generated report is correct). Can you approve that deviation?

Originally Posted by Swall

1. It seems they'd removed all images of the finest scale (1:50000) from the map (perhaps to avoid legal problems) but not from the advertisement. So on the device, max zoom level is limited to 200ì. Attempt to zoom in further results in empty screen.

I think these guys do not have any legal problem because of the project illegal at the whole.
Only mistakes take place. Partially you answer yourself. I do not use SAS.Planet. If only to peep new WMS servers. But I sure the bugs with lack of some scale tile and wrong mapseries are a common problem for Dummies.

The source is great. It is not a scanned map where distortion of scanning, projection recalculation and latitude error for printing purpose is present. It is the product ready for use on a digital device. All that one need to pick up a projection by latitude (it is damn hard)and slightly improve binding. The result is absolutely good after that. Plus or minus 3-6 meters is not predictable and not significant to estimation because on this scale (1:50000) the error in 5 meters is the greatest achievement in any case. And what is stopping to use any routable map for routing and searching beneath the raster layer?

Originally Posted by Giomen

And what is stopping to use any routable map for routing and searching beneath the raster layer?

No problem to do so with the device. Unfortunately, Basecamp is less capable in that regard. Beside, the screen size does matter. This raster picture looks great when it's displayed by Ozi Explorer running on a 8" tablet. Not so great on a tiny screen of GPSMAP 62 device. This is where the vector graphics wins. Power consumption. Perhaps the silicon chips uses more clocks to render a raster image so more current is drawn from the battery making the device less useful in the wood. The greatest advantage is that this map is easy to make. But what puzzles me, this is a very old stuff, the scanned images (not discussing how perfect they are) are circulating on the internet for more than a decade, so it's de-facto a public information. Why the topological information from this images is not yet vectorized by the independent mapping projects like OSM, OTM, etc.?