Coordinate System Issue
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I often use Sketchup to model topographical surveys.
I use the query tool to show the coordinates of various objects within the model.
As we know if a model is placed to far from the origin it creates problems rendering, so generally I do not use "preserve drawing origin" when importing data (dwg files).
However this creates an issue for me in that the query tool does not give me the same coordinates as the original coordinate system used for the survey.Can anyone give me a work around for this or would it be possible to have a "query tool"
that would allow a constant to be applied to x, y, and z coordinates so when used it would show the coordinates as they were in the original survey.Ideally it would be great to be able to set up an independent origin that allowed me to query and export the data at the same coordinates as the original survey. Even if the model was geo-referenced to its Google Earth location.
Thanks, David.
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Check these ones. Height from datum and Coordinates from datum:
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Query might be a bit different from what you're used to.
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@djohnson.nz said:
I often use Sketchup to model topographical surveys.
I use the query tool to show the coordinates of various objects within the model.
.....
Can anyone give me a work around for this or would it be possible to have a "query tool"
that would allow a constant to be applied to x, y, and z coordinates so when used it would show the coordinates as they were in the original survey.Ideally it would be great to be able to set up an independent origin that allowed me to query and export the data at the same coordinates as the original survey. Even if the model was geo-referenced to its Google Earth location.
Thanks, David.
Not my wheel house but their are number of different datum's used. The shape of the earth is estimated by curve fit to data using spherical harmonics with the bottom line the same point will have different locations reported even though the point has not actually moved. Costal areas even carry that further and may actually report different elevations for example the Ordnance Survey used in England. My sense is you will not find making correction as simple as adding a constantt to the data since the cruve fit is transcendental in nature.
See http://en.wikipedia.org/wiki/North_American_Datum
https://www.e-education.psu.edu/natureofgeoinfo/c2_p16.html#comment-6996
http://www.uwgb.edu/dutchs/UsefulData/UTMFormulas.htm -
David,
I have sent, by personal message, a modified Query Tool that will allow you to enter the x,y,z constants to be added to the model position.
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sdmitch,I would also be interested in your query tool, if you don't mind sharing.
Mike
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Mike, a copy has been sent by PM.
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Thanks sdmitch your query tool is perfect for what I am doing.
JQL thanks also your link to TIGs solution also looks like it will do the job, though I had a look and it looked way complex... I like simple, Kudos to sdmitch.
Incidentally I tried doing an import yesterday where I preserved the drawing origin and Sketchup seemed to handle it way better than I remember. Perhaps the new versions have rectified some of the early issues with distance from origin.The next challenge is to be able to geo reference your model with rotation to get the full benefit of accurate shadows and still be able to read and export to a local co-ordinate system. Maybe TIG's solution is closer to this, so I will check it out.
Thanks again all, awesome work....
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sdmitch, just want to say thanks. Today was the first day I had a chance to use this, nice and simple and works perfect.
Mike
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