GeoOrigin
Overview
GeoOrigin specifies local geospatial coordinate system for parent node, enabling increased geographic precision during scene rendering (by mitigating potential floating-point roundoff errors). GeoOrigin can be contained by other Geospatial component nodes, typically via DEF/USE to ensure consistency.
The GeoOrigin node belongs to the Geospatial component and requires at least level 1, its default container field is geoOrigin. It is available from X3D version 3.0 or higher.
Hierarchy
1
2
+ X3DNode
+ GeoOrigin
Fields
SFNode [in, out] metadata NULL [X3DMetadataObject]
Information about this node can be contained in a MetadataBoolean, MetadataDouble, MetadataFloat, MetadataInteger, MetadataString or MetadataSet node.
Hint
MFString [ ] geoSystem [ “GD”, “WE” ]
Identifies spatial reference frame: Geodetic (GD), Geocentric (GC), Universal Transverse Mercator (UTM). Supported values: “GD” “UTM” or “GC” followed by additional quoted string parameters as appropriate for the type.
Hints
- X3D Architecture 25.2.2 Spatial reference frames
- X3D Architecture 25.2.4 Specifying geospatial coordinates
- UTM is Universal Transverse Mercator coordinate system
Warning
- Deprecated values are GDC (replaced by GD) and GCC (replaced by GC).
SFVec3d [in, out] geoCoords 0 0 0 (-∞,∞)
Defines absolute geographic location (and implicit local coordinate frame).
Hint
Warning
- Requires X3D
profile='Full'or else include<component name='Geospatial' level='1'/>
SFBool [ ] rotateYUp FALSE
Whether to rotate coordinates of nodes using this GeoOrigin so that local-up direction aligns with VRML Y axis rotateYUp false means local up-direction is relative to planet surface rotateYUp true allows proper operation of NavigationInfo modes FLY, WALK.
Advice
Hints
- Only one geospatial coordinate system is allowed per scene, thus DEF-ing and later USE-ing only one GeoOrigin node per scene is recommended.
- X3D for Advanced Modeling (X3D4AM) slideset
- GeoOrigin is likely to be restored in X3D v4.0 for special use on devices with limited floating-point resolution.
- X3D Architecture 25.2.5 Dealing with high-precision coordinates
Warnings
- Requires X3D
profile='Full'or else include<component name='Geospatial' level='1'/> - GeoOrigin is deprecated, discouraged and not legal in X3D v3.3. GeoOrigin can be ignored in X3D v3.2 and below.
- XML validation requires placement as first child node following contained metadata nodes (if any).