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GeoInformatics-7-2009
article survey of the munster topcon gms-2 the office for surveying and registration in munster is responsible for the municipal mapping of the 302.9 square kilometer city. in order to include detailed features within an accuracy range of less than one meter on the maps, the office decided to use topcon s handheld gms-2 receiver. using the gms-2 means that graduate engineer erich taube is able to collect precise position information for areas that cannot be covered by existing aerial photography. in the future, this information will be uploaded to the internet. by one of the editors of our tasks is the creation of all forms of topographic mapping as well as continuous updating. all services derived from this data, like the production of prints etc., are also within our field of activity. during this process, quick and reliable access to this data is essential. therefore, we use our own file server on which all geographic information is stored. citizens are able to chose from different thematic maps such as points of interest and others. geographical information current mapping of the city is needed not only by the many civic offices and institutions but also by companies and private individuals. the police department and emergency medical services have a permanent need for current maps and use our mapping products. these maps are house-number accurate . a key reason for purchasing the gms-2 is its ability to connect to the panasonic cf-19 toughbook running the hhk geograf software which makes use of sapos real-time correction data. the gms-2 is the most compact single-frequency receiver that is able to process sapos correction data and export corrected coordinates as nmea strings. the option of monitoring real-time measuring accuracy via hdop, vdop and pdop on the display is a great advantage. the use of the gms-2 in connection with the panasonic cf-19 has stood the test of time. additionally, due to the great color display during a walk through the survey area, mr taube described his work to us. the basic 1:5000 mapping and aerial photography of munster form the basis for our work. this existing information is completed by carrying out measurements with the gms-2, and thus creates the basis of the municipal cartography. we can compare a map on the spot with the real world and record details. this, of course, is only possible outdoors! updating the mapping an important task extending 21 kilometers from east to west and 22 kilometers from south to north, munster is the second largest city of northrhine-westphalia in terms of area. currently, the office for surveying and registration employs around 100 people. one and the software extension etopplus for arcpad7 (developed by topcon) it is possible to use the gms-2 without cf-19 in difficult environments. internet: www.topcon-positioning.eu 42 october/november 2009
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