Standards for Linear Referencing

Transcription

1 Standards for Linear Referencing Dr. Paul Scarponcini Bentley Transportation Data Management March 3, 2004 Rapid City, South Dakota 2004 Bentley Systems, Inc.

2 Linear Referencing PROJECT project: name: value cost: value location (spatial) location: at some ( x, y ), or at lat/long positions (linear) location: Along Route 95 from milepoint 2. to milepoint 2.6

3 Linear Referencing Measuring along a line or any linear element How we measure: Linear Referencing Method (LRM)

4 ROADWAY CHARACTERISTICS PROJECT project: name: value cost: value location -pavement: value, location 2-lanes: value, location 3-shoulder: value, location 00-speed: value location BRIDGE bridge: id: value type: value location LOCATION DESIGN design speed:value,location sight distance:value,location USER DEFINED SEGMENT segment: attribute-: value attribute-2: value location TRAFFIC AADT: time, value, location CRASH crash: conditions: value fatalities: value location

5 Dilemma: PROJECT BRIDGE SEGMENT TRAFFIC ROADWAY DESIGN CRASH location location location location location location location differing Linear Referencing Methods, inside and external to the organization

6 32+00 Locations Measures C +.8 miles 2.5 miles 50 % 4 km A miles

7 Standards Can Help Electrical plugs CD, DVD, USB Bentley Systems, Inc. Bar Codes

8 Where it is happening ISO IEC International Organization for Standardization TC204 TC2 JTC International Electrotechnical Commission Joint Technical Committee OGC SC32 Sub Committee Working Group WG4 WG3 Open GIS Consortium Liaison L 2004 Bentley Systems, Inc. H2 INCITS ANSI Technical Advisory Group (TAG) InterNational Committee for Information Technology Standards American National Standards Institute

9 Current Linear Referencing Standards Activity ISO TC2 933 (Navigation and Tracking) one of many ways of defining a position Geospatial One-Stop (Transportation) incorporates 933 OGC Abstract Specification Topic 2 (Coordinate Referencing Systems) simple only profile? SAE J2266 (Location Referencing Message Specification - LRMS) ISO TC204 (Graphic Data Files - XGDF) OGC GML Bentley Systems, Inc.

10 ISO TC2 Geographic Information/Geomatics Projects 90 Reference model 920 Functional standards (Report) 903 Conceptual schema language 92 Imagery and gridded data 904 Terminology 922 Qualifications and certification of personnel (Report) 905 Conformance and testing 923 Schema for coverage geometry and functions 906 Profiles 924 Imagery and gridded data components 907 Spatial schema 925 Simple feature access 908 Temporal schema 926 Profile FACC Data Dictionary 909 Rules for applications schema 927 Geodetic codes and parameters 90 Methodology for feature cataloguing 9 Spatial referencing by coordinates 92 Spatial referencing by geographical identifiers 928 Web Map server interface 929 Imagery, gridded and coverage data framework 930 Sensor and data models for imagery and gridded data 93 Quality principles 93 Data product specifications 94 Quality evaluation procedures 932 Location based services possible standards 95 Metadata 933 Location based services tracking and navigation 96 Positioning services 934 Multimodal location based services for routing and navigation 97 Portrayal 935 Procedures for registration of geographical information items 98 Encoding 936 Geography Markup Language 99 Services 937 Generally used profiles of the spatial schema and of similar important other schemas

11 ISO TC2 933 LR_PositionExpression + meas ure : Measure +LRM LR_LinearReferenceMethod + name : CharacterString + type : Charact ers tring + units : UnitOfMeasure + offsetunits : UnitOfMeasure + positiveoffsetdirect ion : LR_Offset Direction = " right" + projec t(pt : GM_Point) : LR_PositionExpression LR_Element 0.. +offset +referencedomain +referent 0... LR_OffsetExpression + offsetreference : LR_OffsetReferenc e + offset[ 0.. ] : Measure LR_ReferenceMarker + name : CharacterString + type : CharacterString + position[0..] : GM_Point + location[0..] : LR_PositionExpression..* +datummarkers {ordered} +marker..* <<CodeList>> LR_OffsetReference + centerline + edgeoftravel + rightofway + curb + edgeofberm + sidewalkinside + sidewalkoutside <<enumeration>> LR_OffsetDirection + left + right

12 NCHRP LRS Data Model Event // Event //2 Event //N Event N/N/ Event N/N/2 Event N/N/N LRM / LRM /2 LRM /N LRM N/ LRM N/2 LRM N/N Network Network 2 Network N Datum Source A Source B Source N

13 Generalized Model for Location Referencing Developed in 998 Introduced at GIS-T 99, San Diego Published for peer review in US and International, Civil and GIS Journals: Journal of Computing in Civil Engineering, Jan 0 GeoInformatica, Mar 02 Implemented at Mn/DOT Commercial Product 2002 Pending ISO Standard (TC2 933 DIS)

14 Generalized Model Event // Event //2 Event //N Event N/N/ Event N/N/2 Event N/N/N linear elements LRM / LRM /2 Network Source A LRM /N Network 2 Datum Source B LRM N/ LRM N/2 Network N Source N LRM N/N traversal link anchor section line

15 Location Expression (LX) LX = ( LRM, LE, DX ) LX = linear expression LRM = Linear Referencing Method LE = linear element DX = distance expression

16 Locations ( HOW, WHAT, Measure ) ( LRM, Linear Element, Measure ) (MilePoint, Route: I-95, 2.5 ) (KilometerPoint, Route: I-95, 4 ) (Percentage, Link: Link 034, 50 ) (Mile Post, Route: US-40, ) (Reference Post, Route: I-95, ) (County MilePoint, Route: I-95, +.8 ) (Station, Alignment: Project 42, ) (Address, Street: Smith Rd., 55 )

17 Linear Reference Methods: a way to identify a specific location with respect to a known point Absolute Distance MilePoint MeterPoint Percentage Relative Distance MilePost ReferencePost County MilePoint Other Stationing Address

18 Linear Elements (LE) MP RP MP2 RP2 Route Min Address Street Block Max Address 0+00 Alignment Node Link Node 2 AP Anchor Section AP 2 Graphic ( x, y ) ( x n, y n )

19 Distance Expressions (DX) 4 km 50 % 2.5 miles 55 C +.8 miles A miles 32+00

20 LR_PositionExpression + measure : Measure +LRM LR_LinearReferenceMethod + name : CharacterString + type : CharacterString + units : UnitOfMeasure + offsetunits : UnitOfMeasure + positiveoffsetdirection : LR_OffsetDirection = "right" + project(pt : GM_Point) : LR_PositionExpression LR_Element 0.. +offset +referencedomain +referent 0... LR_OffsetExpression + offsetreference : LR_OffsetReference + offset[0..] : Measure LR_ReferenceMarker + name : CharacterString + type : CharacterString + position[0..] : GM_Point + location[0..] : LR_PositionExpression..* +datummarkers {ordered} +marker..* <<CodeList>> LR_OffsetReference + centerline + edgeoftravel + rightofway + curb + edgeofberm + sidewalkinside + sidewalkoutside <<enumeration>> LR_OffsetDirection + left + right start linear feature A end Position Expression = ( LRM, Linear Element, Measure )

21 LR_PositionExpression + measure : Measure +LRM LR_LinearReferenceMethod + name : CharacterString + type : CharacterString + units : UnitOfMeasure + offsetunits : UnitOfMeasure + positiveoffsetdirection : LR_OffsetDirection = "right" + project(pt : GM_Point) : LR_PositionExpression LR_Element 0.. +offset +referencedomain +referent 0... LR_OffsetExpression + offsetreference : LR_OffsetReference + offset[0..] : Measure LR_ReferenceMarker + name : CharacterString + type : CharacterString + position[0..] : GM_Point + location[0..] : LR_PositionExpression..* +datummarkers {ordered} +marker..* <<CodeList>> LR_OffsetReference + centerline + edgeoftravel + rightofway + curb + edgeofberm + sidewalkinside + sidewalkoutside <<enumeration>> LR_OffsetDirection + left + right absolute distance start linear feature A end

22 LR_PositionExpression + measure : Measure +LRM LR_LinearReferenceMethod + name : CharacterString + type : CharacterString + units : UnitOfMeasure + offsetunits : UnitOfMeasure + positiveoffsetdirection : LR_OffsetDirection = "right" + project(pt : GM_Point) : LR_PositionExpression LR_Element 0.. +offset +referencedomain +referent 0... LR_OffsetExpression + offsetreference : LR_OffsetReference + offset[0..] : Measure LR_ReferenceMarker + name : CharacterString + type : CharacterString + position[0..] : GM_Point + location[0..] : LR_PositionExpression..* +datummarkers {ordered} relative distance +marker..* <<CodeList>> LR_OffsetReference + centerline + edgeoftravel + rightofway + curb + edgeofberm + sidewalkinside + sidewalkoutside <<enumeration>> LR_OffsetDirection + left + right start linear feature referent A end

23 LR_PositionExpression + measure : Measure +LRM LR_LinearReferenceMethod + name : CharacterString + type : CharacterString + units : UnitOfMeasure + offsetunits : UnitOfMeasure + positiveoffsetdirection : LR_OffsetDirection = "right" + project(pt : GM_Point) : LR_PositionExpression LR_Element 0.. +offset +referencedomain +referent 0... LR_OffsetExpression + offsetreference : LR_OffsetReference + offset[0..] : Measure LR_ReferenceMarker + name : CharacterString + type : CharacterString + position[0..] : GM_Point + location[0..] : LR_PositionExpression..* +datummarkers {ordered} absolute distance +marker..* <<CodeList>> LR_OffsetReference + centerline + edgeoftravel + rightofway + curb + edgeofberm + sidewalkinside + sidewalkoutside <<enumeration>> LR_OffsetDirection + left + right start linear feature offset end B

24 LR_PositionExpression + measure : Measure +LRM LR_LinearReferenceMethod + name : CharacterString + type : CharacterString + units : UnitOfMeasure + offsetunits : UnitOfMeasure + positiveoffsetdirection : LR_OffsetDirection = "right" + project(pt : GM_Point) : LR_PositionExpression LR_Element 0.. +offset +referencedomain +referent 0... LR_OffsetExpression + offsetreference : LR_OffsetReference + offset[0..] : Measure LR_ReferenceMarker + name : CharacterString + type : CharacterString + position[0..] : GM_Point + location[0..] : LR_PositionExpression..* +datummarkers {ordered} absolute distance +marker..* <<CodeList>> LR_OffsetReference + centerline + edgeoftravel + rightofway + curb + edgeofberm + sidewalkinside + sidewalkoutside <<enumeration>> LR_OffsetDirection + left + right start linear feature referent offset end relative offset C

25 Summary ISO TC2 933 has progressed to Draft International Standard (DIS) ANSI L submittal of Geospatial One-Stop Work continues in OGC, TC204 and SAE TransXML has just begun For additional information: paul.scarponcini@bentley.com 2004 Bentley Systems, Inc.