1. NJMC-MERI GIS Critical Coverage Overview Presented by: Dom Elefante New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

2. CRITICAL COVERAGES Role of MERI-GIS Other Critical Coverages: 1. Roads, Rails 2. Hydrology 3. Contours 4. Buildings New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

3. Digitized RoadsDigitized Roads 1992 Topographic Base Map1992 Topographic Base Map GIS coverage version(s) – early 1990’sGIS coverage version(s) – early 1990’s Modified & Updated SinceModified & Updated Since Latest Coverage reflects 2000 changesLatest Coverage reflects 2000 changes Based on NJDEP orthosBased on NJDEP orthos Roads, CL, Rds2001, DOT, TIGERRoads, CL, Rds2001, DOT, TIGER Roads Coverage New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute History

4. Roads – Description ROADS, RDS2001 Arcs – 4,960/ 4,229Arcs – 4,960/ 4,229 Polygons – 3,545/ 858Polygons – 3,545/ 858 Nodes – 4,860/ 3,803Nodes – 4,860/ 3,803 Annotations – blank/ 187Annotations – blank/ 187 Tics – 592/ 8Tics – 592/ 8 Arc Segments – 46,408/ 292,003Arc Segments – 46,408/ 292,003 Polygon Labels – 3,544/ 857Polygon Labels – 3,544/ 857 New Jersey Meadowlands Commission Meadowlands Environmental Research Institute

5. 20001994 New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

6. Have several versions (1994/ 2000)Have several versions (1994/ 2000) Overlap / inconsistency where roads should beOverlap / inconsistency where roads should be Don’t really have a roads coverage for GIS analysisDon’t really have a roads coverage for GIS analysis Minimal attribute dataMinimal attribute data Inability to geocode – match address if neededInability to geocode – match address if needed Tiger – Does not overlay accurately over parcel coverage or other critical coveragesTiger – Does not overlay accurately over parcel coverage or other critical coverages Problems New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

7. Based on Aerial and Topographic mapping to remedy inconsistency (tied to ground controls)Based on Aerial and Topographic mapping to remedy inconsistency (tied to ground controls) National Mapping AccuracyNational Mapping Accuracy One single coverageOne single coverage Road coverage with Attributes of Streets, and related topologyRoad coverage with Attributes of Streets, and related topology Changes will reflect updatesChanges will reflect updates GDT/ Dynamap or Tele Atlas Road DataGDT/ Dynamap or Tele Atlas Road Data Solution New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

8. Railroads … New Jersey Meadowlands Commission Meadowlands Environmental Research Institute Digitized features from 1992 Topo mapsDigitized features from 1992 Topo maps Have one versionHave one version Has NOT been Modified & Updated SinceHas NOT been Modified & Updated Since History

9. Rails – Description/ Topology New Jersey Meadowlands Commission Meadowlands Environmental Research Institute RAILS Arcs – 1,677Arcs – 1,677 Polygons – NonePolygons – None Nodes – 6,958Nodes – 6,958 Tics – 49Tics – 49 Arc Segments – 6,282Arc Segments – 6,282 Polygon Labels – NonePolygon Labels – None

10. Rails … continued New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute Will have updated version based on Aerial and Topographic mappingWill have updated version based on Aerial and Topographic mapping National Mapping AccuracyNational Mapping Accuracy One single coverageOne single coverage Rail coverage to contain attributesRail coverage to contain attributes SOLUTIONS Require updateRequire update No Attribute DataNo Attribute Data No annotationNo annotation PROBLEMS

11. Hydrology New Jersey Meadowlands Commission Meadowlands Environmental Research Institute Digitized features from 1992 Topo mapsDigitized features from 1992 Topo maps Have several versions – early 1990’sHave several versions – early 1990’s NOT Modified & Updated SinceNOT Modified & Updated Since Water, Channels (Ditches)Water, Channels (Ditches) History

12. Hydrology – Description/ Topology New Jersey Meadowlands Commission Meadowlands Environmental Research Institute WATER & CHANNELS Arcs – 604/ 6,875Arcs – 604/ 6,875 Polygons – 112/ 0Polygons – 112/ 0 Nodes – 596/ 2,968Nodes – 596/ 2,968 Annotations – blank/ blankAnnotations – blank/ blank Tics – 49/ 49Tics – 49/ 49 Arc Segments – 15,653/ 23,880Arc Segments – 15,653/ 23,880 Polygon Labels – 111/ nonePolygon Labels – 111/ none

13. Land Use NumbersLand Use Numbers Accounting for water, where they overlap with other land usesAccounting for water, where they overlap with other land uses No attributes/ annotationNo attributes/ annotation Inconsistency with other Critical CoveragesInconsistency with other Critical Coverages Problems New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

14. Will have an update of the water coverage with the completion of Aerial & Topographic Mapping ProjectWill have an update of the water coverage with the completion of Aerial & Topographic Mapping Project Keep one copy for everyone to useKeep one copy for everyone to use Provide general attributes / annotation to the coverageProvide general attributes / annotation to the coverage Resolve inconsistencies with other Critical Coverages (i.e. property lines)Resolve inconsistencies with other Critical Coverages (i.e. property lines) Solution New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

15. Contours (contour_so) New Jersey Meadowlands Commission Meadowlands Environmental Research Institute Digitized features from 1992 Topo mapsDigitized features from 1992 Topo maps Only southern portion of District completedOnly southern portion of District completed 13/ 33 Sheets (4 in draft)13/ 33 Sheets (4 in draft) New version available from Fly-byNew version available from Fly-byHistory

16. Contours– Description/ Topology New Jersey Meadowlands Commission Meadowlands Environmental Research Institute CONTOURS Arcs – 4,538Arcs – 4,538 Polygons – NonePolygons – None Nodes – 8,774Nodes – 8,774 Points – 2,348Points – 2,348 Tics – 4Tics – 4 Arc Segments – 723,701Arc Segments – 723,701

17. Don’t have a seamless coverageDon’t have a seamless coverage Missing DataMissing Data Can’t digitize every single line (where it gets too messy)Can’t digitize every single line (where it gets too messy) Process tedious…Process tedious… Problems New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

18. One single coverageOne single coverage Missing data will be resolved with new topographic mapping (2002)Missing data will be resolved with new topographic mapping (2002) Seamless DEM, TIN, contour for modelingSeamless DEM, TIN, contour for modeling Provide new way of visualizing dataProvide new way of visualizing data Solution New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

19. Buildings New Jersey Meadowlands Commission Meadowlands Environmental Research Institute Digitized features from 1992 Topo mapsDigitized features from 1992 Topo maps Have two versions (different base)Have two versions (different base) No attribute data associatedNo attribute data associated New version fits well over orthoNew version fits well over ortho History

20. Building – Description New Jersey Meadowlands Commission Meadowlands Environmental Research Institute BLDG & BLDG2001 Arcs – 27,932/ 4,960Arcs – 27,932/ 4,960 Polygons – 4,055/ 3,545Polygons – 4,055/ 3,545 Nodes – 27,716/ 4,860Nodes – 27,716/ 4,860 Tics – 592/ 592Tics – 592/ 592 Arc Segments – 55,944/ 46,408Arc Segments – 55,944/ 46,408 Polygon Labels – 4,054/ 3,544Polygon Labels – 4,054/ 3,544

21. Don’t have a seamless coverageDon’t have a seamless coverage Overlap with old & new coverageOverlap with old & new coverage Missing DataMissing Data No attributesNo attributes Data remains as 2DData remains as 2D Visualization based on arbitrary heights to building footprintVisualization based on arbitrary heights to building footprint Problems New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

22. New Jersey Meadowlands Commission Meadowlands Environmental Research Institute 1990s 2000

23. One single coverageOne single coverage Missing data will be resolved with new topographic mapping (2002)Missing data will be resolved with new topographic mapping (2002) Provide attributes with coverageProvide attributes with coverage Seamless modelSeamless model Provide new way of visualizing dataProvide new way of visualizing data Solution New Jersey Meadowlands CommissionMeadowlands Environmental Research Institute

24. What’s new… New Jersey Meadowlands Commission Meadowlands Environmental Research Institute

26. QUESTIONS? QUESTIONS? DISCUSSION