State Highway Postmiles [ds1901]

SDE Feature Class

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Tags
Transportation


Summary

Postmiles is used to display postmile locations on a map display, or to query for the purposes of finding a specific location reference by county, route, and postmile. Postmiles are coded with the district, county, route, postmile prefix (if any), postmile, and postmile suffix (if any). The source of data is the Caltrans TSN (Transportation System Network) database as it appeared on February 26, 2018. Two additional fields - PMInterval and 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). PMInterval indicates the interval on which the postmile falls: 0.001, 0.01, 0.1, 1, 5, or 10. This field is handy for drawing a subset of postmiles at desired intervals, for example this Definition Query will tell ArcMap to draw postmiles only at 1 mile intervals: "PMInterval" greater than or equal to 1 Though the vast majority of postmiles fall on a 0.1 (tenth mile) or higher intervals, postmiles are included that fall on a lesser interval. Examples are the beginning or end of a route or county, or at an equation point. These postmiles can be identified through use of the "HwySegment" field that contains codes of "Begin County", "Begin Segment", "Mid Segment", "End Segment", and "End County". Begins and ends of routes are coded "Begin County" and "End County". A Definition Query that would tell ArcMap to draw postmiles only at 1 mile intervals or the begin of county would be: "PMInterval" greater than or equal to 1 OR "HwySegment" = Begin County AlignCode indicates if the postmile is on a Right alignment, Left alignment, Right Side of an independent alignment, or Left Side of an independent alignment. Where TSN considers most state highways to have just a centerline, the underlying linework that the postmiles 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 TSN treats the segment as a single centerline. In the last case the underlying linework has dual carriageways, and TSN 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 postmiles for just one alignment (e.g. Right alignment), and only for the other side where TSN indicates independent alignments. In other cases (e.g. large scale mapping), it may be appropriate to display postmiles for both alignments, regardless of how TSN treats the segment. This is an example of a Definition Query that would tell ArcMap to display postmiles at one mile intervals only on the right alignment where TSN indicates just a centerline, and on both right and left alignments where TSN indicates independent alignments: "PMInterval" greater than or equal to 1 AND "AlignCode" less than x greater than 'Left' Similarly, only at 1 mile intervals or beginning of county, and not Left: ("PMInterval" greater than or equal to 1 OR "HwySegment" = Begin County) AND "AlignCode" less than x greater than Left The Odometer field represent the actual distance in miles from the start of the highway to the postmile. This is in contrast to the postmile value, which no longer represents this value as each highway is realigned (and made longer or shorter) over time.

Description

Postmiles are valid postmile points at 1 (one) mile intervals, based on Office of GIS Linear Referencing System layer (TIGER linework). Exceptions that are included are the beginning and ends of routes (and other situations) that don't necessarily begin or end on the even 1 mile interval.

Credits

Use limitations

Extent

West -124.350153 East -113.674437
North 42.068401 South 32.444071

Scale Range
Maximum (zoomed in) 1:5,000
Minimum (zoomed out) 1:150,000,000

ArcGIS Metadata

Topics and Keywords

Themes or categories of the resource transportation


* Content type Downloadable Data
Export to FGDC CSDGM XML format as Resource Description No

Place keywords California

Theme keywords Transportation

Citation

Title State Highway Postmiles [ds1901]
Publication date 2019-03-0500:00:00


Presentation formats * digital map
FGDC geospatial presentation format vector digital data


Citation Contacts

Responsible party
Organization's name California Department of Transportation District 5
Individual's name Andy Richardson
Contact's position District 5 GIS Coordinator
Contact's role point of contact


Contact information
Phone
Voice (805) 549-3571

Address
e-mail address Andy.Richardson@dot.ca.gov



Responsible party
Organization's name California Department of Transportation District 5
Contact's role originator


Resource Details

Dataset languages English(UNITED STATES)
Dataset character set utf8 - 8 bit UCS Transfer Format


Status completed
Spatial representation type * vector


* Processing environment Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270


ArcGIS item properties
* Name State Highway Postmiles [ds1901]
* Location Server=; :; Database=; User=; Version=
* Access protocol ArcSDE Connection

Extents

Extent
Geographic extent
Bounding rectangle
Extent type Extent used for searching
* West longitude -124.350153
* East longitude -113.674437
* North latitude 42.068401
* South latitude 32.444071
* Extent contains the resource Yes

Extent in the item's coordinate system
* West longitude -361021.483000
* East longitude 525373.105600
* South latitude -603121.710800
* North latitude 450011.367000
* Extent contains the resource Yes

Resource Points of Contact

Point of contact
Individual's name Andy Richardson
Organization's name California Department of Transportation District 5
Contact's position District 5 GIS Coordinator
Contact's role point of contact


Contact information
Phone
Voice (805) 549-3571

Address
e-mail address Andy.Richardson@dot.ca.gov



Resource Maintenance

Resource maintenance
Update frequency as needed


Resource Constraints

Legal constraints
Limitations of use
Please do not redistribute this dataset. Refer requestors back to Caltrans, District 5.

Spatial Reference

ArcGIS coordinate system
* Type Projected
* Geographic coordinate reference GCS_WGS_1984
* Projection WGS_1984_Web_Mercator_Auxiliary_Sphere
* Coordinate reference details
Projected coordinate system
Well-known identifier 102100
X origin -20037700
Y origin -30241100
XY scale 10000
Z origin 0
Z scale 1
M origin 0
M scale 1
XY tolerance 0.001
Z tolerance 0.001
M tolerance 0.001
High precision true
Latest well-known identifier 3857
Well-known text PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]

Reference system identifier
* Value 3857
* Codespace EPSG
* Version 8.8(9.3.1.2)


Spatial Data Properties

Vector
* Level of topology for this dataset geometry only


Geometric objects
Feature class name DS1901_20190307
* Object type point
* Object count 0



ArcGIS Feature Class Properties
Feature class name DS1901_20190307
* Feature type Simple
* Geometry type Point
* Has topology FALSE
* Feature count 0
* Spatial index TRUE
* Linear referencing FALSE



Data Quality

Scope of quality information
Resource level feature




Data quality report - Quantitative attribute accuracy
Measure description
Attribute accuracy is high, but not 100%. Errors are based on currentness of source database (TSN), or may result as dataset ages.




Data quality report - Absolute external positional accuracy
Dimension horizontal


Measure description
Horizontal accuracy is only as good as the TIGER layer, generally within 5 meters.




Geoprocessing history

Process
Date 2019-03-0711:10:56
Tool location c:\program files (x86)\arcgis\desktop10.6\ArcToolbox\Toolboxes\Data Management Tools.tbx\Project
Command issued
Include in lineage when exporting metadata No


Process
Date 2019-03-0711:14:09
Tool location c:\program files (x86)\arcgis\desktop10.6\ArcToolbox\Toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
Command issued
Include in lineage when exporting metadata No


Distribution

Distributor
Contact information
Individual's name Andy Richardson
Organization's name California Department of Transportation District 5
Contact's position District GIS Coordinator
Contact's role distributor


Contact information
Phone
Voice (805) 549-3571

Address
e-mail address Andy.Richardson@dot.ca.gov





Distribution format
* Name SDE Feature Class


Transfer options
Online source
Location https://www.wildlife.ca.gov/Data/BIOS
Function performed information

Online source
Location ftp://ftp.wildlife.ca.gov/BDB/GIS/BIOS/Public_Datasets/1900_1999/ds1901.zip
Function performed download

Fields

Details for object DS1901_20190307
* Type Feature Class
* Row count 0


Field Shape
* Alias Shape
* Data type Geometry
* Width 4
* Precision 0
* Scale 0
* Field description
Feature geometry.
* Description source
ESRI
* Description of values
Coordinates defining the features.




Field OBJECTID
* Alias OBJECTID
* Data type OID
* Width 4
* Precision 10
* Scale 0
* Field description
Internal feature number.
* Description source
ESRI
* Description of values
Sequential unique whole numbers that are automatically generated.




Field Route
* Alias Route
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
State Highway Route number.


Field RouteID
* Alias RouteID
* Data type String
* Width 16
* Precision 0
* Scale 0
Field description
Unique identifier of underlying Linear Referencing layer. RouteID along with Measure fields can allow these points to be re-dynamically segment points.


Field RouteS
* Alias RouteS
* Data type String
* Width 4
* Precision 0
* Scale 0
Field description
State Highway Route number with unique identifier of underlying Linear Referencing layer. RouteID along with Measure fields can allow these points to be re-dynamically segment points.


Field County
* Alias County
* Data type String
* Width 3
* Precision 0
* Scale 0
Field description
County (standard 3-character abbreviation).


Field District
* Alias District
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Caltrans district (1-12).


Field RteSuffix
* Alias RteSuffix
* Data type String
* Width 1
* Precision 0
* Scale 0
Field description
Route suffix.
List of values
Value U
Description Unrelinquished route.


Value S
Description Supplemental route.


Value Z




Field PM
* Alias PM
* Data type Double
* Width 8
* Precision 38
* Scale 8
Field description
Postmile


Field PmPrefix
* Alias PMPrefix
* Data type String
* Width 1
* Precision 0
* Scale 0
Field description
Postmile prefix.
List of values
Value C
Description Commercial lanes


Value D
Description Duplicate postmile at meandering county line


Value G
Description Reposting of duplicate postmile at end of a route


Value H
Description Realignment of D mileage


Value L
Description Overlapping postmile


Value M
Description Realignment of R mileage


Value N
Description Realignment of N mileage


Value R
Description First realignment


Value S
Description Spur


Value T
Description Temporary connection




Field PMc
* Alias PMc
* Data type String
* Width 9
* Precision 0
* Scale 0
Field description
Combined postmile. Combined from PmPrefix, PM, PmSuffix.


Field Odometer
* Alias Odometer
* Data type Double
* Width 8
* Precision 38
* Scale 8
Field description
Actual distance in miles (calculated from the running summation of postmiles) from the beginning of the route to this postmile.


Field PMInterval
* Alias PMInterval
* Data type Double
* Width 8
* Precision 38
* Scale 8
Field description
Highest postmile interval (0.001 mile, 0.01 mile, 0.1 mile, 1 mile, 5 mile, 10 mile) that this postmile lands on.
List of values
Value 0.001
Description Postmile represents 1/1000th of a mile.


Value 0.01
Description Postmile represents 1/100th of a mile.


Value 0.1
Description Postmile represents 1/10th of a mile.


Value 1
Description Postmile represents 1 mile.


Value 5
Description Postmile represents 5 miles.


Value 10
Description Postmile represents 10 miles.




Field HwySegment
* Alias HwySegment
* Data type String
* Width 15
* Precision 0
* Scale 0
Field description
Indicates if the postmile lands on the beginning or ending of a highway segment, beginning or ending of a county, or somewhere within a segment.
List of values
Value Begin County
Description Postmile lands on the beginning of a county (or route).


Value Begin Segment
Description Beginning of a segment (where postmiling changes for some reason, e.g. an equation point).


Value Mid Segment
Description Postmile lands along the segment; not at segment end point.


Value End Segment
Description Postmile lands on the end of a segment (where postmiling changes for some reason, e.g. an equation point).


Value End County
Description Postmile lands on the ending of a county (or route).




Field PmSuffix
* Alias PMSuffix
* Data type String
* Width 1
* Precision 0
* Scale 0
Field description
Postmile suffix.
List of values
Value L
Description Left alignment


Value R
Description Right alignment




Field AlignCode
* Alias AlignCode
* Data type String
* Width 20
* Precision 0
* Scale 0
Field description
Alignment code
List of values
Value Right
Description Falls on a right alignment (may be identical to left alignment)


Value Left
Description Falls on a left alignment (may be identical to a right alignment).


Value Right Split Align
Description Falls on a right independent alignment.


Value Left Split Align
Description Falls on a left independent alignment.




Field RouteType
* Alias RouteType
* Data type String
* Width 10
* Precision 0
* Scale 0
Field description
Route Type - State, US, Interstate
List of values
Value State
Description State highway


Value US
Description US Highway


Value Interstate
Description Interstate Highway






Metadata Details

Metadata language English(UNITED STATES)
Metadata character set utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata dataset
Scope name * dataset


* Last update 2019-03-07


ArcGIS metadata properties
Metadata format ArcGIS1.0
Standard or profile used to edit metadata FGDC
Metadata style FGDC CSDGM Metadata


Created in ArcGIS for the item 2019-03-0711:09:26
Last modified in ArcGIS for the item 2019-03-0711:11:04


Automatic updates
Have been performed Yes
Last update 2019-03-0711:11:04


Metadata Contacts

Metadata contact
Individual's name Andy Richardson
Organization's name California Department of Transportation District 5
Contact's position District GIS Coordinator
Contact's role point of contact


Contact information
Phone
Voice (805) 549-3571

Address
e-mail address Andy.Richardson@dot.ca.gov



Metadata Maintenance

Maintenance
Update frequency as needed


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