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发表于 2022-7-8 13:37:00
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Not being a frequenter of other Forums, I had never seen such colouration as repeated emphasis. (I must get out more!)
To the matter in hand. You should try to open your DXF file in AutoCAD. Either it will, or it won't because it has been prepared in a later version of AutoCAD. Opening the drawing will allow you to see what coordinate system has been used to draw up the survey. It could either be a Universal Transverse Mercator system or a local system.
I suggested using Google Earth, because at the bottom left of the display, there is a continuous update of Latitude and Longitude coordinates at the pointer. This display can be altered to Universal Transverse Mercator coordinates. If you are fortunate, the aerial shots in the location you are looking for, may be of sufficient resolution, that you can identify ground features. If so, you can read off the coordinates at the corners. I would have thought it unrealistic and not very useful to convert every scrap of information to Latitude and Longitude, bearing in mind that that is a spherical coordinate system and the length of one degree in Latitude is NOT equal to the length of one degree in Longitude, except at the equator.
As a side bit of information, even the Latitude and Longitude of the present GPS system was not zeroed when it was set up. There is a "Golden Nail" which an International Treaty defined as the position of the Prime Meridian 0.00°. Google Earth manages to miss this point by over 100 metres, but relatively, the GPS is very accurate within itself.
So you can take the complicated absolute way, or take the easy Google Way. In this Forum both might turn up. |
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