It was mentioned here before, now it has been officially announced as well - the upgrade of Wichianburi subdistrict municipality to a town municipality (เทศบาลเมืองวิเชียรบุรี). The announcement was signed on May 9, and - as listed in the table before - took effect on May 26. To become complete operational, now the Election Commission of Phetchabun has to draw and announce new constituency boundaries, and then call for local elections to find a new mayor and town council.As usual, the announcement also includes the boundary definition and a map of constituency, even though by the upgrade these did not change. But the shape of the town is quite interesting, approximately a square around the district office and a long appendix to the west along the main street. This area was added in 1985 to the sanitary district [Gazette], originally created in 1956 it was just the area directly around the district office [Gazette]. As its not so easily visible in the scaled down map scan, I have played with Google Maps again...
View Wichianburi Municipality in a larger map
The strange thing creating this map are the coordinates references in the PDF. These are MGRS coordinates, e.g. the first point at UB ๑๙๔๓๒๐. But - UB refers to a coordinate square located are Surin city. At first I suspected that my code to convert the coordinate systems is faulty, but even with another tool I confirmed that in fact the coordinates all have to begin with QT instead of UB, whereas the numbers are correct.
3 comments:
Could you tell how to convert MGRS coordinates used in Thai official announcements with that tool? I have no idea what values I should put in each field.
The MGRS coordinates in the Thai announcements leave out the zone, since there are only two zones anyway, and the two letters are enough to encode all of the country. And of course you have to convert the digits into the normal arabic digits. Thus, you have to enter 47P QT 194320 for that (incorrect) coordinate UB ๑๙๔๓๒๐. Problem is, you'd also have to set the reference frame to Indian 1974 and not WGRS84, but sadly that tool does not include that system, so the coordinates will all be off my approximate 100 meter.
Thank you. I am interested in creating maps in Google Maps too, but not good at this sort of thing.
Post a Comment