[x3d-public] candidate geoSystem correction to JSON schema

[Don Brutzman]

JSON Schema sayeth

"@geoSystem": {
	"description": "Attempts to validate all possible combinations",
	"oneOf": [
		{
			"type": "array",
			"minItems": 1,
			"maxItems": 3,
			"items": [
				{
					"type": "string",
					"enum": [
						"GD",
						"GDC"
					],
					"default": "GD"
				},

while in X3D abstract specification:

25.2.2 Spatial reference frames
http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/geodata.html#Spatialreferenceframes

Table 25.2 — Supported spatial reference frames

lists GD GC UTM and is followed by special cases GDC and GCC.

Suggest adding enumeration values for "GC", "GCC", "UTM"

However I do see other entries further down for "UTM" and default "GD" (though GD is not also listed there as an enum value).

Example scene for testing is Squaw.x3d with Squaw.json including

	"@geoSystem":["UTM","Z10","N"],

Also Mars.x3d and Mars.json with recent updates at

	http://www.web3d.org/x3d/content/examples/Basic/Geospatial/

Not quite sure how you are handling things there, hope you can sort it out OK.  TIA.

all the best, Don
-- 
Don Brutzman  Naval Postgraduate School, Code USW/Br       brutzman at nps.edu
Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
X3D graphics, virtual worlds, navy robotics http://faculty.nps.edu/brutzman