Scanned Topographic maps
Submitted: Tuesday, Mar 31, 2009 at 16:46
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Neptune
Hi all, I have just purchased oziexplorer and am looking to put some paper based colour topographic maps in it. I work for a company that has a design section and a big colour scannerup to A1 size. My question is if I get the colour topographic maps in say 1:100000 and 1:25000 can i get them to scan them and give me the file on my memory stick to download into oziexplorer and what file type should I use and what dpi should i use to scan them. I was thinking 300 dpi. Any suggestions would be great. Thanks
Reply By: Lex M (Brisbane) - Tuesday, Mar 31, 2009 at 17:01
Tuesday, Mar 31, 2009 at 17:01
You should start with the OziExplorer help file and search for "Creating Maps"
AnswerID:
357282
Follow Up By: Lex M (Brisbane) - Tuesday, Mar 31, 2009 at 17:03
Tuesday, Mar 31, 2009 at 17:03
And ask more questions here if you get lost in that. :-)
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Reply By: Member - Fred B (NT) - Tuesday, Mar 31, 2009 at 18:30
Tuesday, Mar 31, 2009 at 18:30
Hi Neptune,
As our earnest friend Lex has suggested, look in the help file under "creating Maps", "creating the image file", that will tell you how to go about it. The next part tells you how to calibrate your map. Just try scanning a small map area to start with, play around with it and then do your larger ones.
The help files are around 200 pages in total, so just print off the sections you need as they arise. Have fun.
AnswerID:
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Reply By: rabs - Tuesday, Mar 31, 2009 at 18:39
Tuesday, Mar 31, 2009 at 18:39
You can scan maps into Ozi very easily, All you need to do is go to file, load and calibrate map, when it loads you need to tell ozi at least 4 points on the map with a latitude and longitude or UTM that I use, make sure the info is correct as in North or south of the equator, datum etc, works very
well, I download a lot of vic goldfields maps and calibrate them for use in Ozi loaded onto my EEE PC laptop, as in the above read the help files so you save them as a map that Ozi can view, any problems please feel free to email me
Cheers
Rabs
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357305
Reply By: HGMonaro - Tuesday, Mar 31, 2009 at 21:51
Tuesday, Mar 31, 2009 at 21:51
I used 300dpi TIFF files. Worked out nicely.
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357329
Reply By: The Explorer - Tuesday, Mar 31, 2009 at 22:40
Tuesday, Mar 31, 2009 at 22:40
Hello
I have all may maps scanned at 200dpi and saved as tiffs. Scans of full maps are pretty big (~75MB) so after you calibrate them it may be wise to convert to OZF or ECW format as you will be able to reduce file size (max ~10MB) plus they load faster.
I don’t see any point in scanning most maps at greater than 200/250 dpi as while the image may be clearer when zoomed in the maps don’t have the accuracy to be examined at that level anyway..so there is no point in zooming in too close (bit like holding a paper map up against your face). Best to keep file size down IMHO.
The ozf conversion program can be found here
img2ozf program here
Keep in mind you have to calibrate the map first as the program looks for the OziExplorer calibration file, not the image file in first instance.
Cheers
Greg
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Reply By: Dunedigger - Wednesday, Apr 01, 2009 at 10:51
Wednesday, Apr 01, 2009 at 10:51
I always save in .JPEG at about 150 DPI and then save at about 50%. Reduces file size dramatically. Calibration ca be a PIA. As I have a lot of maps, I usually calibrate a scanned map using known points that are visible on both maps after saving the known points as waypoints and using them for calibration
Wish I had access to a A1 size scanner !
Dunedigger
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