tops_landxml – LandXML¶
New in version 0.6.
LandXML is committed to providing an non-proprietary data standard (LandXML), driven by an consortium of partners for the inter-operability of data utilized within the Land Development industry.
The official documentation about the format is provided on the LandXML website.
LandXML is a specialized XML (eXtensible Mark-up Language) data file format containing civil engineering and survey measurement data commonly used in the Land Development and Transportation Industries.
LandXML use a schema which specifies how to formally describe the elements of the document. The schema currently used is version 1.2.
Currently, the header of the XML file will always be:
<?xml version="1.0"?> <LandXML xmlns="http://www.landxml.org/schema/LandXML-1.2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.landxml.org/schema/LandXML-1.2 http://www.landxml.org/schema/LandXML-1.1/LandXML-1.1.xsd" date="" time="" version="1.1"> <Units> <Metric areaUnit="squareMeter" linearUnit="meter" volumeUnit="cubicMeter" temperatureUnit="celsius" pressureUnit="milliBars" angularUnit="grads" directionUnit="grads"></Metric> </Units> <Project name="Template"></Project> <Application name="TotalOpen Station" desc="TOPS" manufacturer="" version="" manufacturerURL="http://tops.iosa.it/" timeStamp=""></Application> </LandXML>
Metric is choosed as the default unit system. If one need Imperial, ask for it in the bug tracker.
- Units :
All angular and direction values default to radians unless otherwise noted. Angular values, expressed in the specified Units.angleUnit are measured counter-clockwise from east=0. Horizontal directions, expressed in the specified Units.directionUnit are measured counter-clockwise from 0 degrees = north.
- CgPoints :
A collection of COGO points. (Cg = COGO = Cordinate Geometry).
- InstrumentSetup :
The Instrument setup location is defined by either a coordinate text value (“north east” or “north east elev”) or a CgPoint number reference “pntRef” attribute.
- ObservationGroup :
All observations to the same point in a group should be averaged together (they have consistant orientation).
- TargetPoint :
Represents a 2D or 3D location for the target. It is defined by either a coordinate text value (“north east” or “north east elev”) or a CgPoint number reference “pntRef” attribute.