Geo-reference of historical mapsGeo-reference of historical mapsGeo-reference of historical mapsGeo-reference of historical maps

dr. Timár GáborDept. of Geophysics and Space ScienceEötvös University, Budapest, Hungary

Eötvös Loránd TudományegyetemFöldrajz- és Földtudományi Intézet

1117 Budapest, Pázmány Péter sétány 1/A

Geo-spatial sypozium, Cluj, 19-20 April, 2013

Overview:

1. Geo-reference of historical regional maps

2. Guess of the projection and projection parameters

3. Geo-reference using latitude and longitude lines, then the local projection

4. Export to Google Earth

5. A real difficult example: the Lazarus map of 1528

Try this: an old map of the historical Hungary

Goetz & Probst, 1804

Try this: an old map of the historical Hungary

Meridians: lines to a common pole; prime meridian: Ferro

Try this: an old map of the historical Hungary

Parallels: mostly invisible but assumed to be concentric circles

Try this: an old map of the historical Hungary

Try this: an old map of the historical Hungary

Try this: an old map of the historical Hungary

Standard parallel: from the meridian angles of the map

Central meridian: the vertical one

Origin latitude: not important

Try this: an old map of the historical Hungary

Projection!GCPs should be converted into the real map projection

Try this: an old map of the historical Hungary

Google Earth needs to reproject the map to WGS84/GEOGRAPHIC system...

Try this: an old map of the historical Hungary

Google Earth needs to reproject the map to WGS84/GEOGRAPHIC system...

and...

Try this: an old map of the historical Hungary

A new blog to be launched: http://oldmapsingis.blogspot.com

A much more harder target: Lazarus (1528)

600 GCPs from all around the map

„Brute force” way

Linear fit to UTM33

„Brute force” way

Quadratic fit to UTM33

„Brute force” way

Cubic fit to UTM33

Ptolemian point list

Ptolemian projection... To be defined in GIS

The geo-referred map... Really?

Latitude-longitude grid

Coastlines and rivers

Geo-reference

How to choose the standard parallel in the Equidistant Conic (Ptolemian) projection: false selection (left), correct selection (right)

Thanks for the attention