[TUT] Historical maps

[balloni55]

,,HowTo" find historical map images in internet with GE and create map for later use as overlay inside Locus.

Run rumsey_collection.kmz inside GE:
mark "index map" on left side in GE, > available maps are visible,
left mouse click on rectangle you are interested, next click link "read more, view....."
in opening browser window select map > "export", > "extra large" and download image.
Map covers ~27X37 Km, size <10MB unpacked .jpg, downscaled and calibrated ~ 17MB

or
Run historischekarten.kmz inside GE:
mark "Rahmen" on left side in GE, > available maps are visible,
open "Karten" with "+",
open "alphabetisch" with "+",
mark e.g. "Bamberg" now this map is loaded inside GE.
Right mouse click on "Bamberg"/Properties and copy link.
Open this link with your browser, right mouse click on image/save graphic


Calibrate this image inside Locus
menu/More functions/MAPTOOLS/Image map calibration
http://docs.locusmap.eu/doku.php?id=manual:user_guide:maps_tools:calibrator

Since V 3.14.0 you can use kmz-files as overlay and set transparency of this,
so you´re able to compare e.g. building development or course of a river.

Attached you find both kmz-files

Have fun

P.S.
I am really astonished how precisely maps are drawn hundred years ago without any GPS and PC.

[balloni55]

Create easily overlay.kmz or sqlite.map from calibrated image.jp2 with MAPC2MAPC (MrSIDGeodecode)

I have created overlays with different settings inside MAPC2MAPC and one calibrated inside locus for comparison.
e.g."50Calw3" means, downloaded .jp2 "rescaled 50%" and "JPEG quality 3"
For me with this setting sharpness and file size is a good result, but decide by yourself.


Run rumsey_collection.kmz
mark "index map" on left side in GE, > available maps are visible,
left mouse click on rectangle you are interested,
next click link "Download georeferenced version...."

Map covers ~27X37 Km, size ~7,5MB
Note: if you rename file don´t use special characters !

MAPC2MAPC preparation:
Edit/Preferences and Settings/
-   Output tab > JPEG Quality "e.g. 3"
-   Garmin tab > disable "Transparent KMZ"
-   
Create overlay/map:

1.   File/Load Calibrated Map >x.jp2
2.   select "mercator" >OK
3.   Edit/Rescale Map/e.g. 50 > OK
4.   File/Write Garmin Custom Map (KMZ)   or
Write Map for Mobile device/Locus/Rmaps/sqlite.db

Note: copy map overlay.kmz to Locus/mapItems and map.sqlite to Locus maps