Regional Data Sources.

Transportation & mileposts

Washington State Department of Transportation (WSDOT)

The pack incorporates WSDOT’s MilepostValues — 1 Mile mainline state-route data and uses State Routes classification data during the build to identify and normalize Interstate, U.S. Highway, and Washington State Route classes. The incorporated WSDOT snapshot was retrieved September 30, 2026; its linear-reference data was dated March 16, 2026.

FieldNorth normalized 14,055 WSDOT milepost records into its compact, offline format. The app does not continuously query WSDOT during use.

Official dataset metadata · WSDOT Open Data Policy · WSDOT disclaimer

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Arizona physical highway mileposts

Arizona Department of Transportation (ADOT), MPD Data Analytics · AZGeo

The 2025 HPMS roadway dataset represents calendar-year 2025 conditions. FieldNorth retrieved the source on October 15, 2026 and retains 6,738 physical mile-marker records on 68 signed routes, with 6,483 validated roadway intervals. Printed milepost labels are preserved; LRS measures are used to align paths and are not substituted for roadside labels.

The source's milepost, road-network, carriageway and ownership layers are reconciled with the existing Arizona graph. Coverage is limited to admitted intervals, not every mile or direction on the listed routes. Kilometer, ramp and virtual markers, qualified or ambiguous records, unverified ownership/direction intervals and unsupported graph alignments are excluded. AZ Loop 101, 202 and 303 mileposts are unavailable in this pack because the reviewed app does not recognize their graph route labels. No missing posts are invented.

Permission and attribution. ADOT Public Records confirmed download and use without a fee on October 15, 2026 in response to FieldNorth's request describing commercial use, offline transformation, redistribution in the paid app and periodic updates. This is permission for the described use, not a public-domain declaration or an unrestricted license. ADOT provides the data AS IS, disclaims liability and does not sponsor or endorse FieldNorth.

Colorado highway milepoint data

Colorado Department of Transportation (CDOT)

FieldNorth uses highway milepoint information provided by CDOT through the Colorado Information Marketplace and official CDOT Open Data services. The pack contains 91,158 validated 2026 tenth-mile points from the official Highway 1/10 Mile Points layer. Route classification is obtained at build time from CDOT's official roadway data.

Dataset: Highway Milepoints in Colorado · License: Public Domain · Source retrieved October 5, 2026.

FieldNorth processes relevant source data into an optimized offline format for roadway-location functionality. The app does not query CDOT at runtime.

Florida mileposts & route geometry

Florida Department of Transportation (FDOT), RCI/GIS data

Original October 5, 2026 records were compared with the current official hosted layer on October 26, 2026. Official dataset · Official source service.

FieldNorth transforms factual source records into offline, graph-specific coverage: it preserves printed milepost values and retained marker coordinates, joins records to verified routes, and uses roadway measures to calibrate existing posted-marker positions, not to invent milepost values. Nearby records with the same printed value may share an actual source calibration anchor. No map artwork or basemap imagery is included.

Limited availability. The pack contains 3,428 published marker records across 30 routes, including supported Florida Turnpike segments. Coverage has gaps: 662 source records are excluded; 18 routes lack validated bindings in the reverse source direction; FL-85, FL-285, FL-407 and FL-690 are excluded entirely. This is not complete statewide or both-direction coverage. Unsupported segments withhold mileposts. These checks do not constitute physical field validation.

Source limitations. FDOT data is supplied as-is/as-available and may contain errors or omissions. FieldNorth is independent and is not affiliated with or endorsed by FDOT or the State of Florida. Public access to the source does not establish an unequivocal license for paid offline redistribution; that permission remains uncertain. This notice does not claim conclusive legal clearance.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Transportation & mileposts

Idaho Transportation Department

Agency-generated theoretical highway milepoints, not physical roadside signs.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Illinois mileposts · limited coverage

Mileposts in progress. Limited coverage is available; broader coverage remains incomplete, and further expansion is paused. The published pack contains 657 selected physical sign observations across 86 disjoint corridors, with 408 directional bindings on selected portions of I-39, I-55, I-57, I-64, I-70, I-255 and I-270. This is not statewide coverage, continuous coverage of those highways, or comprehensive coverage of both carriageways or the Illinois Tollway. Road matching and boundaries remain available independently of milepost coverage.

Illinois Department of Transportation (IDOT) · Official IDOT Open Data IL_MilePost inventory. Observations were collected in 2021–2022; service metadata also references 2017–2018. FieldNorth conservatively normalizes posted values from SIGN_LEGEN and binds them to independently reviewed road geometry. ODOMETER is not treated as a posted milepost. Missing, ambiguous, conflicting and insufficiently supported records are excluded. These checks do not constitute physical field validation.

Source terms and limitations. Illinois law provides unrestricted/public-domain treatment for qualifying agency-owned public data; exact ownership is not expressly stated in this item’s metadata. FieldNorth preserves source and transformation provenance; this notice does not claim unequivocal licensing clearance. Accuracy is not guaranteed. FieldNorth is not affiliated with or endorsed by IDOT.

Transportation & mileposts

Massachusetts Department of Transportation; MassGIS (Bureau of Geographic Information), Commonwealth of Massachusetts EOTSS

Official agency roadway-reference records. Coverage and reference types vary; a point is not proof of a physical roadside sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Credit: Massachusetts Department of Transportation; MassGIS (Bureau of Geographic Information), Commonwealth of Massachusetts EOTSS.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Transportation & mileposts

New York State Department of Transportation

Official LRS reference-marker measures. NYSDOT reference markers and roadway milepoint measures are distinct systems and are not interchangeable.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Utah Department of Transportation / Utah Geospatial Resource Center

Physical Mile Reference Posts are distinct from UDOT linear milepoint measures.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Data steward: Utah Department of Transportation. Distribution: Utah Geospatial Resource Center / SGID. Creative Commons Attribution 4.0 International (CC BY 4.0). FieldNorth filters, normalizes, indexes and restructures the source for offline use; this is a modified derivative. Source data is provided as is and as available, without guarantees of completeness or accuracy.

CC BY 4.0 license

Transportation & mileposts

New Jersey Department of Transportation

Official roadway milepost locations derived from the New Jersey Roadway Network. Tenth-mile points do not establish a physical sign at every location.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Transportation & mileposts

Ohio Department of Transportation

Official roadway linear-reference milepoints; these do not establish physical signs at every point.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

MDOT Mile Markers

Physical sign records; a mapped sign does not establish your exact roadway milepoint.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Source snapshot retrieved October 5, 2026. MDOT provides this dataset as is and as available without warranties of accuracy, reliability, timeliness or completeness.

Transportation & mileposts

Wisconsin Department of Transportation

Physical Milepost Markers and Enhanced Reference Markers. Signed route and county information can differ from route designations or the sign’s physical county.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

WisDOT states that its GIS information is not intended for navigation. Data is provided as is without warranties of accuracy, adequacy, completeness, legality, reliability or usefulness. FieldNorth modifies and restructures the source for offline use; it is not an unmodified WisDOT product.

Transportation & mileposts

Minnesota Department of Transportation

Physical reference posts on supported Interstate, U.S. and Minnesota routes. Theoretical posts, gap-offset records, local systems and unsupported suffixes are excluded.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

MnDOT data disclaimer. Neither the State of Minnesota, the Minnesota Department of Transportation nor their employees make any representations or warranties, express or implied, with respect to the use of or reliance on the data provided herewith, regardless of its format or means of transmission. There are no guarantees or representations to the user as to the accuracy, currency, completeness, suitability or reliability of this data for any purpose. The user accepts the data "as is" and assumes all risks associated with its use. The Minnesota Department of Transportation assumes no responsibility for actual, consequential, incidental, special or exemplary damages resulting from, caused by or associated with any user's reliance on or use of this data, even if appraised of the likelihood of such damages occurring.

MnDOT disclaimers, legal notices and policies · Reference Post metadata

Transportation & mileposts

North Carolina Department of Transportation

NCDOT roadway references. The retained MilePostHatching service link does not, by itself, verify a physical sign at each point.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Transportation & mileposts

Virginia Department of Transportation

Physical mile-marker sign records; signs can be placed near, rather than exactly at, the corresponding roadway milepoint.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Source: Virginia Department of Transportation (VDOT). Applicable base GIS data is available from VDOT. FieldNorth filters, normalizes, indexes and restructures the data for offline use. Source snapshot incorporated by October 5, 2026; the originating dataset publication date is not recorded in the pack.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Arkansas highway mile marker data

Arkansas Department of Transportation (ARDOT)

FieldNorth uses highway mile marker and roadway information published by ARDOT through Arkansas public geographic information systems. The pack contains 889 validated points from the current official ARDOT MilePoints layer, with authoritative route classification obtained from ARDOT roadway inventory data at build time. Source retrieved October 5, 2026.

FieldNorth processes relevant source information into a derived, optimized offline format for roadway-location functionality. The app does not query ARDOT at runtime.

Required Source Credit:
“Base Map Provided by Arkansas State Highway and Transportation Department, In Cooperation With The U.S. Department of Transportation”

Official Arkansas GIS metadata and use terms

Transportation & mileposts

Arkansas Department of Transportation (ARDOT)

Mixed roadway-reference and physical-sign sources. A calculated roadway milepoint does not establish that a physical sign exists.

Agency source 1 · Agency source 2

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Base Map Provided by Arkansas State Highway and Transportation Department, In Cooperation With The U.S. Department of Transportation

Transportation & mileposts

Connecticut Department of Transportation

Official LRS mileage-guide references; a roadway milepoint does not establish a physical sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Delaware Department of Transportation / Delaware FirstMap

DelDOT milemarker and roadway references; coverage is limited to records included in the pack.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Indiana Department of Transportation

Official agency roadway-reference records. Coverage and reference types vary; a point is not proof of a physical roadside sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Iowa Department of Transportation (Iowa DOT)

Official agency roadway-reference records. Coverage and reference types vary; a point is not proof of a physical roadside sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Alaska Department of Transportation and Public Facilities

Physical milepost sign records from Alaska DOT&PF; calculated route positions do not establish a roadside sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Hawaii Department of Transportation; Hawaii Statewide GIS Program

Official agency roadway-reference records. Coverage and reference types vary; a point is not proof of a physical roadside sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Kansas Department of Transportation

Official KDOT reference-post values can differ from roadway mileage. Only supported source records and route identities are included.

Agency source 1 · Agency source 2

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Kentucky Transportation Cabinet

Official linear-reference milepoints, not physical roadside sign locations.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Louisiana Department of Transportation and Development

Official agency roadway-reference records. Coverage and reference types vary; a point is not proof of a physical roadside sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Maryland Department of Transportation State Highway Administration

Official agency roadway-reference records. Coverage and reference types vary; a point is not proof of a physical roadside sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Transportation & mileposts

Missouri Department of Transportation / Missouri Spatial Data Information Service

Physical signs remain source records. Supplemental milepoints are calculated from official M-enabled route geometry and do not imply a physical roadside marker.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Transportation & mileposts

Nebraska Department of Transportation

Official agency roadway-reference records. Coverage and reference types vary; a point is not proof of a physical roadside sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

New Hampshire Department of Transportation

Official agency roadway-reference records. Coverage and reference types vary; a point is not proof of a physical roadside sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Agency reference · mileposts not published

Agency transportation reference

This agency reference is not an enabled milepost source in the currently published FieldNorth pack. The offline roadway map remains available; mileposts are unavailable.

Transportation & mileposts

Rhode Island Department of Transportation

RIDOT ALRS roadway milepoints; these do not establish physical signs at every location.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

South Dakota Department of Transportation

Mileage Reference Marker identifiers are not necessarily equivalent to highway mileage.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Original source: South Dakota Department of Transportation. FieldNorth filters, normalizes, indexes and restructures the source into a modified offline derivative. SDDOT makes no representations or warranties regarding the accuracy of its data; FieldNorth is responsible for its modifications.

Transportation & mileposts

Vermont Agency of Transportation

Town-based VTrans LRS milepoints, including derived locations from measured road geometry. They are not statewide continuous mileage or evidence of a physical sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Source: Vermont Agency of Transportation (VTrans). FieldNorth creates a value-added derivative by filtering, validating, normalizing, indexing and integrating the information with its offline roadway system. Vermont prohibits direct, non-value-added reproduction of Open Geodata Portal data with intent to sell. Source information is provided without warranties of accuracy, completeness, reliability or fitness.

Transportation & mileposts

West Virginia Department of Transportation

Physical mile-marker records are distinct from LRS milepoints. A linear-reference location is not proof of a physical sign.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

WVDOT provides geospatial information for general transportation information and does not warrant accuracy, completeness, currentness, merchantability or fitness for a particular purpose. FieldNorth modifies the data for offline use; use of WVDOT information is at the user’s own risk.

Transportation & mileposts

Wyoming Department of Transportation

Official WYDOT highway and ELRS milepost references; values are not independently redefined from calculated distance.

Agency source

FieldNorth filters, normalizes, indexes and converts source information into an offline derivative. Coverage can contain gaps and does not include every highway or road. The named providers do not sponsor or endorse FieldNorth.

Transportation & mileposts

Oregon Department of Transportation (ODOT)

Oregon physical milepost positions and highway names are derived directly from ODOT’s public Mileposts feature service. FieldNorth transforms marker coordinates, ODOT highway names, highway numbers, and marker legends into a compact offline format. ODOT highway names are not necessarily the signed Interstate or U.S. route name.

Official dataset metadata · ODOT Geoportal disclaimer · FieldNorth ODOT-derived machine-readable file

Additional Oregon OSM marker snapshot

FieldNorth also publishes a separate machine-readable Oregon OSM milemarker snapshot adapted from the dated Geofabrik Oregon extract. ODbL 1.0 applies to that OSM-derived database.