以多元測繪技術更新建物圖資作業之探討

Diverse Technologies in Surveying and Mapping to Update Building Map Information

To assure timeliness of GIS building data, this research will discuss the feasibility of processing GIS building layer by updating existing building information to pursue an opportunity other than large-scale aerial survey and operations.
However, there are two critical issues on updating GIS data. First of all, how we select base data from building geomatic information is crucial. Second, there is still a concern about how we consolidate modern surveying technologies including unmanned vehicles photographic surveying, GPS, land surveying and image processing to come up with a thorough and systematic way to update GIS building layer.
Therefore, through our research, we proposed a model for base data selection as well as PDMS (Photo, Detect, Measure, Survey) processing. There are four subjects in our proposal: simplified UAS photographs georeferencing, change points detection, feature points measuring and field land survey.
We selected one 1/1,000 area topographic map in Taoyuan and Hsinchu respectively as well as a number of intensively populated areas as our research focus. Through suitable base data and PDMS update processing, we have established GIS building data, analyzed and verified the result of our research. According to our experiment, we proved the feasibility when using PDMS to update GIS building data with ideal accuracy coverage frequency. In addition to large-scale aerial surveys nationwide, we provide a more active and flexible way to establish GIS building data as well as support updating building Map information.