This page gives Ohio-specific tagging recommendations and examples. It supplements the much more comprehensive tagging reference at Map Features.
|highway=motorway||Interstate highways, including loops and spurs; significant portions of US and state routes built to Interstate standards (high-speed, fully access-controlled).||
|highway=trunk||Selected U.S. and state routes not built to Interstate standards. High-speed, limited-access, usually divided highways with at least two lanes in each direction. May have occasional traffic lights and unlit street-level crossings, but mostly controlled-access with on- and off-ramps. Two-lane undivided (but still limited-access) sections of Trunk might make sense if they are extensions of divided Trunk highway or Motorway.||
|highway=primary|| Other U.S. routes; major state routes, such as those that connect larger county seats not directly connected by US routes, or are important connectors between primary or higher roads. An example of which routes might be promoted to
|highway=secondary||Other state routes; good connecting roads, such as those that connect cities not directly connected by state routes, or are important connectors between secondary or higher roads. Sections of secondary roads generally should not "dead-end" at lower-class roads. Be sure to add the road to a route relation if applicable.||
|highway=tertiary||County routes (signed or unsigned) and other major local roads, typically along section lines or connecting towns. Consider adding the road to a route relation if applicable.||
|highway=unclassified||Rural roads, serving mostly farmland or forest properties, of little to no value as through routes. Consider adding the road to a route relation if applicable.|
|highway=residential||City/neighborhood streets not qualifying as tertiary or higher, or rural roads which have become lined with houses.|
|ref=I ##||Interstate highways. Be sure to add the highway to a route relation.||
|ref=US ##||U.S. routes. Be sure to add the highway to a route relation.||
|ref=SR ##|| State routes. Do not use
| ref=CR ##
| County routes. The ref=* tag probably should only be used for roads where the county route number is signed as clearly as on a state route; otherwise, consider using unsigned_ref=* or loc_ref=* instead. The TIGER data often includes
| ref=TR ##
|Township routes. The ref=* tag should only be used for roads where the township route number is signed as clearly as on a state route; otherwise, consider using unsigned_ref=* or loc_ref=* instead. Consider adding the road to a route relation if applicable. Note that, in some northwestern counties, it’s perfectly valid for a township road number to be a fractional number (using either a period or hyphen).|
|ref=Cty Rt 53||City routes in Fremont.|
|maxspeed=70 mph|| Rural and suburban freeways (
|maxspeed=65 mph|| Unsignalized rural expressways (|
|maxspeed=60 mph|| Rural divided highways (
||Cleveland, Toledo, Akron interstates|
|maxspeed=55 mph|| Older urban freeways and expressways (
|maxspeed=50 mph|| Some older urban freeways and expressways (
|maxspeed=45 mph|| Some rural tertiary, unclassified roads. The largest suburban surface streets (|
|maxspeed=40 mph|| Some rural tertiary, unclassified roads. Many urban and suburban collector roads (|
|maxspeed=35 mph|| State routes outside business districts but within city/village limits (|
|maxspeed=30 mph|| Some urban and suburban roads (|
|maxspeed=25 mph|| Local streets in residential areas and business districts within city/village limits (|
|maxspeed=15 mph|| Urban alleys (|
|maxspeed=10 mph|| Some private roads (|
|maxspeed=5 mph||Some private (especially unpaved) roads. Generally, service=parking_aisle (isles) in parking lots. Specify the speed limit using something like maxspeed:conditional=20 mph @ (Mo-Fr 07:45-15:30), which is for school zones. The times of day may vary; see Conditional restrictions for the full syntax.|
Use maxspeed:advisory=* for yellow speed limit signs on highway ramps and curved sections of roadway.
Note that speed limits in OSM are usually specified in kilometers per hour, so speed limits in the U.S. must be explicitly labeled as miles per hour:
Just remember to use a space and lowercase the "mph" abbreviation. See United States roads tagging for more information.
Land use areas are useful for giving the map more structure than administrative boundaries alone. Land use in OpenStreetMap is not necessarily about zoning. Though these areas often generally correspond to zoning areas, the subjective character of the neighborhood is a more significant factor for choosing a landuse=* tag. For example, a landuse=industrial area covers a large swath of the Mill Creek Valley north of Cincinnati, befitting the area's heavy industrial character:
As an area gets mapped in greater detail, these informal land use areas give way to more verifiable land use areas that indicate the formal boundaries of planned developments. For example, Deerfield Township in Warren County is neatly subdivided into many residential, retail, and commercial complexes – plus a few farms – each with names reflecting prominent signage. It is much easier to browse the map now that the land use areas have been drawn in:
When you draw a formal, planned land use area, you should try to follow the property boundaries, without worrying about overlapping with land cover features like natural=wood areas. For example, a residential subdivision may go right down the middle of a tree row that separates it from another residential subdivision.
Especially in Southwestern Ohio (Greater Cincinnati and Greater Dayton), the longtime consensus among local mappers is that formal land use areas should be connected to roads, riverbanks, and administrative boundaries as applicable. This practice is discouraged in some other parts of the world, but it suits this region well. To illustrate our reason for connecting to roads, consider that a typical legal property definition often refers to a pin embedded in a road pavement, then explicitly follows the road's center line for a certain number of feet.
|landuse=residential||Residential areas, like subdivisions. Useful for getting subdivision names on the map.|
|leisure=park||City and county parks, plus county fairgrounds.|
|leisure=nature_reserve||Nature preserves maintained by local or state agencies or by private organizations. Many state parks are best thought of as nature preserves.|
|tourism=attraction attraction=maze||Corn mazes.|