In the metropolitan area of Hsinzhu, around the administrative border of Taoyuan, Hsinzhu, once there is a empty place on OpenStreetMap, not well-mapped area. When you open the only available satellite image Bing image of the time, you will tell why it is impossible to map anything, there is only low-res image in the area availabe on Bing Image. The only thing mappers can do is drawing Provincial Highway, Freeway, traditonal railway or high speed railway. And of course mappers could not map the common pond used for irrigation, and could just sigh and compliant about the situation, nothing could do.

Several years later there are DigitalGlobe and Mapbox satellite, which could be use for tracing by mappers. And finally Bing enhanced there image quality, there is no more wide range of low-res image. We the mappers could easily trace the road and residental area.

Taiwan Governement release open data, the official map which is maintained by National Land Survay Center also distribute zome level 15 map verison, could be accessed by WMS. OpenStreetMap mappers could make sure if a road exist, and even draw small alley in the residental area. Coach Mappers could just trace NLSC Open Data map with no pian on OpenStreeteMap.

In the recent years, OSM data in Taiwan is greatly enhanced, even small adminstrative level like villages was mapped. Data users could easily extract data. There are places that have more active mappers, the stores and local amenities are well mapped. The wide blank of Taoyuan and Hsinzhu is no more a problem, just a pasted history. There are more people contribute data on OpenStreetMap in Taiwan, and have wide range of interests, and map varies things. We hope OpenStreetMap community could encourage more contribution to the map.