| StateHighways | |
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Data format: Shapefile File or table name: StateHighways Coordinate system: Geographic Theme keywords: Transportation |
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Abstract:
StateHighways are state highways based upon Office of GIS Linear Referencing System layer (Tele Atlas North America linework). Each record in this layer represents a highway segment where the county, route, postmile prefix, and postmile suffix are the same. Each segment has a begin and end postmile. |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
StateHighways are state highways based upon Office of GIS Linear Referencing System layer (Tele Atlas North America linework). Each record in this layer represents a highway segment where the county, route, postmile prefix, and postmile suffix are the same. Each segment has a begin and end postmile.
State Highways is used to display state highways on a map display. Each record represents a stretch of highway where the county, route, postmile prefix, and postmile suffix are unchanging, and there are no gaps or overlaps in the postmiles. Each segment is coded with the district, county, route, postmile prefix (if any), begin postmile, end postmile, and postmile suffix (if any). One additional field - AlignCode - should be understood by the user for effective use of this data set (refer to the Entity and Attribute Information section of this metadata). AlignCode indicates if the state highway segment is on a Right alignment, Left alignment, Right side of an independent alignment, or Left side of an independent alignment. Where TASAS considers most state highways to have just a centerline, the underlying linework that these segments are based upon has a line for each direction. In some cases the right and left lines are identical (where there is no median). In other cases the right and left are separated (where there is a median, or dual carriageways), but TASAS treats the segment as a single centerline. In the last case the underlying linework has dual carriageways, and TASAS treats the segment as a split alignment (where there are independent right and left alignments). In some cases (especially for small-scale mapping), it may be appropriate to display linework for just one alignment (e.g. Right alignment), and only for the other side where TASAS indicates independent right and left alignments. In other cases (e.g. large-scale mapping), it may be appropriate to display postmiles for both alignments, regardless of how TASAS treats the segment. This is an example of a query string that displays linework only for the right alignment where TASAS indicates just a centerline, and on both right and left alignments where TASAS indicates independent alignments: "AlignCode" <> 'Left'
publication date
None
Internal feature number.
ESRI
Feature geometry.
ESRI
State Highway Route number.
Unique identifier of underlying Linear Referencing layer. RouteID along with Measure fields can allow these points to be re-dynamically segment points.
County (standard 3-character abbreviation).
Caltrans district (1-12).
Route suffix.
Unrelinquished route.
Postmile prefix.
Begin postmile (of segment).
End postmile (of segment).
Postmile suffix.
Begin combined postmile (combined PmPrefix, bPM, PmSuffix).
End combined postmile (combined PmPrefix, ePM, PmSuffix).
Begin measure from underlying Linear Referencing layer. Along with RouteID and eMeasure could be used to re-dynamically segment these highway segments.
End measure from underlying Linear Referencing layer. Along with RouteID and bMeasure could be used to re-dynamically segment these highway segments.
Alignment code
Falls on a right alignment (may be identical to left alignment)
Falls on a left alignment (may be identical to a right alignment).
Falls on a right independent alignment.
Falls on a left independent alignment.
Route Type - State, US, Interstate
State highway
US Highway
Interstate Highway
50 Higuera Street