topic Re: Lat/Long in Web Scene in ArcGIS CityEngine Questions

Lat/Long in Web Scene

Anonymous User — Mon, 20 Jan 2014 07:41:18 GMT

Original User: miglanisomil

Hello,

I am looking for a way to fetch the latitude longitude of a point through the web scene just like in city engine. Now, I know the extent of the scene in Lat/Long and the extent of the scene in the scene coordinate system (Cartesian). One way is to interpolate/extrapolate between the two using the extents, but this is a bit complicated. Is there a way to directly get the Lat/Long value of a point in the web scene? Or an easier way to do this? any suggestions are helpful.

Thanks,
Somil Miglani

Re: Lat/Long in Web Scene

Anonymous User — Mon, 20 Jan 2014 13:18:02 GMT

Original User: matthiasbuehler

Hi,

No, bad news, this is not possible with the WebViewer at this point in time.

As the name implies, it's a viewer of 3d geometries, so the actual georeferencing data is not needed for this, thus dropped to save resources.

Ok ?

Matt

Re: Lat/Long in Web Scene

Anonymous User — Mon, 20 Jan 2014 14:57:46 GMT

Original User: miglanisomil

Hello Matthias,

Thanks for the reply. Too bad.

Okay!
Somil

Re: Lat/Long in Web Scene

AlexandruVasile2 — Mon, 22 Aug 2016 10:56:10 GMT

Is it possible to get the lat/long of a scene inside CE? (not in the web scene)

I need to know the lat/long of the corners of the Terrain

I see the x and z offsets, but i have no idea how to convert them to lat/long.

Thanks

Re: Lat/Long in Web Scene

ThomasFuchs — Mon, 22 Aug 2016 12:59:28 GMT

Hello Alexandro Vasile

The corners of the terrain are given in the projected scene coordinate system you have set in the your CityEngine scene.

CE help on: Scene Coordinate System

A quick way to show lat/long coordinates of the Terrain corner would be:

Set the View Coordinate System to Long/Lat [decimal degrees]
Set the camera to top
Zoom into the corner of the terrain that correspondents to the x and z offset point
Write down the displayed lat/long values

Re: Lat/Long in Web Scene

AlexandruVasile2 — Mon, 22 Aug 2016 14:09:32 GMT

Hi Thomas,

Thank you very much for the response

This is very helpful (really what i needed). But I still don't get the relation between the lat/long and the x/z-offsets.

Also, is there a way to extract them (not writing them down manually)? I found the python function getPosition, but it returns the x,y,z.

Thanks and have an amazing day

Re: Lat/Long in Web Scene

LR — Mon, 22 Aug 2016 18:56:30 GMT

Last time I tried to get the coordinates (of building polygons) in lat/long I ended up writing my own coordinate transformation in Python. The formulas depend on the current and target coordinate system, but you should be able to google up the right formulas. A little warning, it's not going to be as simple as x2 =x1*2+20 .

Re: Lat/Long in Web Scene

AlexandruVasile2 — Tue, 23 Aug 2016 08:45:11 GMT

In that case, I'll stick to writing it manually

thanks