Background:
road
or aerial (Microsoft Virtual Earth)
Transparency:
Sources
1897: Suomen Matkailija-Yhdistys: Suomi kartasto, Map of Helsinki. Copyright for digital version Pauli Kruhse / Histdoc.net.
Map template: This page is based on the Old Oakland page by Michal Migurski and uses javascript code originating from the page. For more information on how to make maps like this, see the blog post Flea market mapping by Michal Migurski. The transparency slider was inspired by Sautter.com/map.
