Helsinki Area By Bike - About

Last updated 2011-08-18.

Areas

The visited areas are based on a map called "Kartat ja Kadunnimet Pääkaupunkiseutu" (ISBN: 951-98617-1-8, printed in 2001):

• Scale 1:20 000
• KKJ coordinate system
• 48 A4 pages (210 × 297 mm)
• Each page covers 4 × 5 = 20 square kilometers (200 × 250 mm)
• In total the map covers 48 × 20 = 960 square kilometers
• The map covers:
  • Helsinki (exluding some islands and the expansion to Sipoo in 2009)
  • Most parts of Espoo
  • Vantaa
  • Kauniainen
  • Small parts of Kirkkonummi, Vihti, Nurmijärvi, Tuusula, Kerava and Sipoo

Extensions

The map was extended by 20 pages (A-T) in 2009 to cover also all of Helsinki and Espoo and by 7 pages (a-g) in 2010 to cover all of Ulkoilukartta and by 12 pages (h-s) in 2011. The extensions can be shown/hidden using the left-click context menu.

Trips

The trips are recorded with GPS logger i-gotU GT-120 (marketing name myLOGGER) and cycle computer Atech K29. No map is used during the trips.

Other Maps

• Kansalaisen Karttapaikka - Maanmittauslaitos
  • This is used as normative reference, all the other maps are just approximations
  • Covers Finland
  • No street names
• kartta.hel.fi
  • Covers Helsinki, Espoo, Vantaa and Kauniainen
  • Street names
• Pääkaupunkiseudun ulkoilukartta
  • Requires Java
• Retkikartta.fi - Metsähallitus
• Google Maps
• Bing Maps (Microsoft)
  • In many areas more accurate and newer satellite images than in Google Maps
• Nokia Maps
  • In some areas newer satellite images than in Bing Maps
• OpenStreetMap

Implementation Details

• Uses JavaScript version of Google Maps API (version 3.4)
• Uses JSON in JavaScript to store trips data
• Uses Mark McClure's PolylineEncoder class and Io.js in trips data generator
• KKJ coordinates were converted to EUREF89 (WGS84) using EurefMuunnos

Browser Compatibility

• Mozilla Firefox version 6.0: OK
• Opera version 11.50: OK
• Microsoft Internet Explorer version 9.0.8112.16421: OK
• Google Chrome version 12.0.742.122: OK

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