20230830 vector digital data https://gisdata-caltrans.opendata.arcgis.com/ https://wildlife.ca.gov/Data/BIOS Postmiles are valid postmile points at 0.1 (1/10th) mile intervals, based on the Caltrans Linear Referencing System. Exceptions that are included are the beginning and ends of routes (and other situations) that don't necessarily begin or end on the even 0.1 mile interval. This geometry is based upon the extraction from TSN on 10 October 2022. Postmiles is used to display postmile locations on a digital 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. 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" >= 1 Though the vast majority of postmiles fall on a 0.1 (tenth mile) or larger intervals, postmiles are included that fall on a smaller 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" >= 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. On undivided highways the right and left lines are identical. On divided highways the right and left are separated, but TSN treats the segment as a single centerline. In the last case where highways are not only divided but also have different lengths (where the right and left carriageway diverge around physical obstacles or are separated onto different one-way streets) the underlying linework has dual carriageways, and TSN treats the segment as an "independent alignment". 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 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 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" >= 1 AND "AlignCode" 'Left' Similarly, only at 1 mile intervals or beginning of county, and not Left: ("PMInterval" >= 1 OR "HwySegment" = 'Begin County') AND "AlignCode" '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. Complete Annually -124.350153 -113.674437 42.068401 32.444071 None Transportation, Postmiles ISO 19115 Topic Categories transportation None California None Postmiles is made available to the public solely for informational purposes. Information provided is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While Caltrans makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The California Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein. Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data. Department of Transportation LRS Feedback LRS California Department of Transportation (Caltrans) Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270 Attribute accuracy is high, but not 100%. Errors are based on currentness of source database (TSN), or may result as dataset ages. Horizontal accuracy is only as good as the TIGER layer, generally within 5 meters. Vector Entity point 311298 NAD 1983 California Teale Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 ds1901 File Geodatabase Feature Class Esri Shape Feature geometry. ESRI Coordinates defining the features. OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Route State Highway Route number. Caltrans County County (standard 3-character abbreviation). Caltrans RouteS Combination of Route and Route Suffix. Caltrans PMRouteID The unique Postmile Route identifier. For the Postmile Network this is comprised of County (characters 1-3), Route (characters 4-6), Route Suffix (character 7) Postmile Prefix (character 8), Postmile Suffix (character 9) and Alignment (character 10). A period (".") is used as a placeholder for the third character of a two-character county or missing Route Suffix, Postmile Prefix or Postmile Suffix. Caltrans District Caltrans district (1-12). Caltrans RteSuffix Route suffix. Caltrans U Unrelinquished route. Caltrans S Supplemental route. Caltrans PM Postmile Caltrans PmPrefix Postmile prefix. Caltrans C Commercial lanes Caltrans D Duplicate postmile at meandering county line Caltrans G Reposting of duplicate postmile at end of a route Caltrans H Realignment of D mileage Caltrans L Overlapping postmile Caltrans M Realignment of R mileage Caltrans N Realignment of N mileage Caltrans R First realignment Caltrans S Spur Caltrans T Temporary connection Caltrans PMc Combined postmile. Combined from PmPrefix, PM, PmSuffix. Caltrans Odometer Actual distance in miles (calculated from the running summation of postmiles) from the beginning of the route to this postmile. Caltrans PMInterval Highest postmile interval (0.001 mile, 0.01 mile, 0.1 mile, 1 mile, 5 mile, 10 mile) that this postmile lands on. Caltrans 0.001 Postmile represents 1/1000th of a mile. Caltrans 0.01 Postmile represents 1/100th of a mile. Caltrans 0.1 Postmile represents 1/10th of a mile. Caltrans 1 Postmile represents 1 mile. Caltrans 5 Postmile represents 5 miles. Caltrans 10 Postmile represents 10 miles. Caltrans HwySegment 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. Caltrans Begin County Postmile lands on the beginning of a county (or route). Caltrans Begin Segment Beginning of a segment (where postmiling changes for some reason, e.g. an equation point). Caltrans Mid Segment Postmile lands along the segment; not at segment end point. Caltrans End Segment Postmile lands on the end of a segment (where postmiling changes for some reason, e.g. an equation point). Caltrans End County Postmile lands on the ending of a county (or route). Caltrans PmSuffix Postmile suffix. Caltrans L Left alignment Caltrans R Right alignment Caltrans AlignCode Alignment code Caltrans Right Falls on a right alignment (may be identical to left alignment) Caltrans Left Falls on a left alignment (may be identical to a right alignment). Caltrans Right Split Align Falls on a right independent alignment. Caltrans Left Split Align Falls on a left independent alignment. Caltrans RouteType Route Type - State, US, Interstate Caltrans State State highway Caltrans US US Highway Caltrans Interstate Interstate Highway Caltrans Direction General traveled direction (NB, EB, SB, WB) of entire route. Individual locations may vary. Caltrans NB Northbound Caltrans EB Eastbound Caltrans SB Southbound Caltrans WB Westbound Caltrans PMoffset Used for Dynamic Segmentation. Is the same value as PM except for the second point of every equation point (Begin County, Begin Segment). This causes the second point to be offset downstream by 0.001 miles. For cartographic purposes, this prevents two postmile points from being exactly coincident. Caltrans Department of Transportation LRS Feedback LRS LRS Feedback@dot.co.gov Please do not redistribute this dataset. Refer requestors back to Caltrans. 20230921 Department of Transportation LRS Feedback LRS LRS Feedback@dot.co.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time