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LandXML 2006

LandXML.org 2006. Nathan Crews Principal Schema Architect, LandXML.org Software Researcher, Autodesk Civil Engineering/Survey/Imaging Software Development. Outline. LandXML.org Members LandXML Primer LandXML-1.0 Adoption Registered Software Applications Government Recognition/Usage

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LandXML 2006

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  1. LandXML.org 2006 Nathan Crews Principal Schema Architect, LandXML.org Software Researcher, Autodesk Civil Engineering/Survey/Imaging Software Development

  2. Outline • LandXML.org • Members • LandXML Primer • LandXML-1.0 Adoption • Registered Software Applications • Government Recognition/Usage • LandXML-1.1 Geospatially Enabled • 3D Roads, Construction, ePlan, EPSG and OGC coordinate system support, dual coordinate systems enabled. • Status • LandXML Multi-Domain Data Interoperability • Building systems • Geospatial

  3. LandXML.org: Worldwide, Open, Grass roots Organization • Initiated in December 1999 by former US DOT EAS-E initiative members and Autodesk. • In March of 2000 we had 26 members. • July 2006: LandXML.org has expanded around the world to 37countries and grown to over 531 representatives from 441 member companies/government agencies.

  4. LandXML Primer

  5. What is “LandXML” • A specialized XML data file format containing civil engineering and survey measurement data commonly used in the Land Development and Transportation Industries.

  6. LandXML.org Goal: Open Design/Survey Data Exchange • Specify an XML file format for civil engineering design and survey measurement data for the purposes of: • Transferring engineering design data between producers and consumers. • Providing a data format suitable for long-term data archival. • Providing a standard format for electronic design submission.

  7. LandXML is a “grass roots” Industry Standard • LandXML-1.0 • July 17, 2002 Ratified as an industry standard by LandXML.org. • Based on W3C XML Schema Recommendation May 2, 2001. • LandXML Software Developers Kit 1.0 and documentation. • LandXML-1.1 • Ratified July 21, 2006 • LandXML Software Developers Kit 1.1 available now.

  8. LandXML Data Model

  9. LandXML Data ModelHousekeeping Data & COGO • Project • Project name and description. • Application • Application used to produce the data. • Author • Who created the data. • Units • Linear, angular, area, time, temperature, pressure, diameter, volume, flow and velocity. • Elevation unit and LatLong Angular unit (1.1) • Coordinate Systems • Grid and Projected coordinate systems • EPSG (European Petroleum Standards Group) codes (1.1) • OGC common names (1.1) • Cogo Points • The basic 3D point with name, number, description, code and purpose. • All points support Latitude, Longitude, ellipsoid elevation attributes. (1.1) • Cogo Geometry • Contiguous Lines, circular curves, spirals, irregular lines and chains.

  10. LandXML Data ModelDesign Geometry Data • Feature Dictionary • Provides definitions for extending LandXML data. (1.1) • Parcels • Closed parcel coordinate geometry • Area, centroid, owner, class, type • 3D parcel volumes (1.1) • Alignments • Road centerline 2D coordinate geometry. • Profiles: vertical design alignments and sampled ground profiles. • Cross Sections: design cross sections and sampled surface sections. • Superelevations • Station Equations • Surfaces (digital terrain models) • TIN – The computed Triangulated Irregular Network of 3-point triangle faces. • Grid – 4-point grid faces. • Source Data: breaklines, contours and points used to compute the TIN or GRID.

  11. LandXML Data ModelDesign Geometry Data • Roadways (3D road model) • Alignments (profiles, design cross sections (1.1)) • Surfaces (top and sub-surfaces) • PlanFeatures • Lanes and Intersections • PipeNetworks • Stormwater pipes and structures. • PlanFeatures • Generic geometric data like fence lines, as-built data (curbs, building outlines, etc…).

  12. LandXML Data ModelSurvey Data • Monuments • Survey monument data • Survey order, class, type, description. • Survey • Field book data: raw and reduced survey observations. • Equipment, personnel and data collection parameters. • Optical, EDM and GPS supported.

  13. LandXML supported by many software applications • 54+ Registered Software Applications from Autodesk, Bentley, CAiCE, Carlson, Eagle Point, Leica GeoSystems, MircroSurvey, Trimble Navigation, Tripod Data Systems, Topcon, the U.S. FHWA and many more. • Adopted for use by governments around the world.

  14. Government Usage • Landonline, cadastral e-survey system in New Zealand. • EPlan, cadastral e-survey system in Queensland Australia. • Design data schema for the emerging suite of US AASHTO transportation industry suite of XML standards called TransXML. • US Federal Highway Administrations IHSDM. • Part of Finland’s national InfraModel2 standard. • Slovenia national 3D road model standard.

  15. LandonlineLand Information New Zealand Landonline LandXML Cadastral data flow Landonline 1. Search 2. Extract LandXML File External Survey Software 3. Prepare LandXML File 5. Submit 4. Pre-validate

  16. U.S. FHWA IHSDM Software

  17. Adoption In Process • US FAA Airports Third Party Survey program • US AASHTO SDMS • Ongoing discussions and projects in: • Thailand • Japan • Canada • Australia, roads

  18. Adoption Process • Initiate participation with LandXML.org • Communicate requirements • Integrate applicable changes to next version of schema and / or • Create extension by • Feature dictionary • Embed custom schema in <Feature> • Create schema that references LandXMLExample • Document and publish schema changes • Review by all members • Create LandXML Usage Specification

  19. Standards Collaboration • TransXML (FHWA, DOT, AASHTO, TRB) • Design/Survey data schema • Open Geospatial Consortium • CAD to GIS • The GeoWeb

  20. The many things can you do with LandXML data files…

  21. LandXML data can be used to: • Exchange data between many civil engineering/survey desktop and CAD-based software applications. • Export data for automated machine control. • Create engineering/construction reports. • Import parcels, roads, surfaces into Architectural applications. • Submit online cadastral surveys. • Export data to Geospatial applications. • Send staking data to survey field instruments. • Create 3D project visualizations.

  22. Design Visualization / Analysis Cost Estimation Design Creation LandXML Design Reports Design Validation IHSDM Field Staking

  23. LandXML-1.1 Geospatially Enabled

  24. LandXML-1.1 • The intent for this revision was to make corrections and additions based on real world experience. • 1.0 and 1.1 designed to be forward and backward compatible! • No drastic model changes that force significant work to update the existing applications. • Geospatially enabled

  25. LandXML-1.1 Change Summary • Added EPSG/OGC common coordinate system names to <CoordinateSystem> (shared by Open Geospatial Consortium and GML schemas). (LandGML / OGC) • Support “Dual Coordinate Systems”: 2.5D Grid and World Lat/Longs. (FAA – NGS) • Add “Feature Dictionaries” to communicate meaning of custom Feature elements. (FAA – NGS) • Add support for PI based alignment definitions (AASTHO). • Improve documentation to eliminate ambiguous data definitions (TransXML).

  26. LandXML-1.1 Change Summary… • Add data structure to support additional electronic Australian cadastral survey system. • Add road design cross section definitions to Alignments. • Add support for non-linear road design cross section transitions. • Adjust the <PipeNetwork> structure to better support modern hydraulic materials such as curved pipe. • Add railway cant (superelevation) data to <Alignment>. • Miscellaneous minor schema validation/model changes.

  27. Multi-Domain Data Interoperability

  28. Multi-Domain Data Interoperability • LandXML is proving to be useful outside the civil engineering/survey domain. • Architects • Buildings do connect to the ground, utilities and roadways. • Construction Applications • Automated machine control • Geospatial applications • Import new design / survey projects quickly and efficiently. • Data exchange for site and road maintenance. • Traffic modeling • Model the proposed road, analyze traffic capacity and simulate impact.

  29. LandXML: A Ready Source of GIS Data GIS Analysis CAD GIS Visualization Survey Data Collection LandXML File GIS MappingIntegration DesignAnalysis

  30. Summary • The LandXML-1.0 standard is supported by many applications. • LandXML-1.1 improves the usefulness of the design data for construction, online survey systems and GIS interoperability. • LandXML-1.1 is being adopted quickly • Requests for LandXML-1.1.xsd are already 50% of LandXML-1.0.xsd requests.

  31. From CAD to GIS in 2 Seconds

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