Mercator Projections & the Tissot Indicatrix

The introduction of draggable polygons into the Google Maps API has proved very popular with developers. A number of developers have used draggable polygons to demonstrate the effects of Google using the Mercator Projection in Google Maps. Google itself created a demo game, called the Mercator Puzzle. The game uses a number of country shapefiles that when moved along the lines of longitude resize

[kochizufan]

スペースタグにいた頃、データベースレイヤの中でポリゴンが動き回るという概念をどう実現するか頭悩ませたなー。発案の教授はそんなもん現場がよきにはからえ、的態度で徹底してたけど。

[nilab]

Google Maps Mania: Mercator Projections & the Tissot Indicatrix