Google Earth Community: Downtown Vancouver 3d city model

example placemark for questions in this post: parcels under 1 acre in moorehead, Mn. (12,463 parcels / filesize 1.5meg)
datasource & credits: http://www.gis.co.clay.mn.us/

(edited 4-24, dropped db from model, parcel pgon extruded in meters based on shape file db acerage field)

To be presenting this in the future, you have posted the initial model in a good place for feedback and questions.

I am curious if you have tried exporting from a gis app. to kml without getting boundary offset errors.

I have noticed at 0 elev. or near 0 elevation boundary line offset errors to GE projections from esri exports decrease.

for example in the middle of the gulf of mexico, i can measure from a lat/lon pt to a oil lease boundary (esri pt. & pgon export to kml) and end up will little if any error within GE

In GE at other global locations errors increase in some instances dramatically.

any idea why ?

note boundary errors in the attached placemark views N, S, E, W.

within ESRI the parcel shape file along with aerial(mrsid), fit like the edges of a newly pressed book. whereas in GE bldg structures of the GE aerial do not fall within the parcel boundaries of the ESRI export.

projections: UTM, WGS, PLSS all the same within ESRI, like thread through the eye of a needle.

any idea why within GE the offset occurs?

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JP Wade - Click for Permissions
www.czmartin.com/jpw - Contact & list of models submitted to GE Forum

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Edited by jpwade (07/24/06 03:32 PM)

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