Key:depth

depth
Description
The depth of a feature, in metres. Show/edit corresponding data item.
Group: properties
Used on these elements
may be used on nodesmay be used on waysmay be used on areas (and multipolygon relations)should not be used on relations (except multipolygon relations)
See also
  • est_depth=*
Status: de facto
More details at taginfo
Tools for this tag

Depth is a property referring to how deep a feature is according to charted depth, measured in metres. For shallow depths, such as some fords, a decimal value will be needed - e.g. 0.05 for 5 cm. In most cases, the depth of a feature in the ocean is referred to LAT (Lowest Astronomical Tide). For rivers, canals, and inland lakes this might be different. Rivers and canals with water level gauges will have a defined zero value where depths should be referred. For more background information, see Water Depth.

Seamarks

When depth=* is used with Seamarks, you may want to add these additional tags, which correspond to attributes from IHO S-57:

Source Quality (QUASOU)

depth:source_quality=*
OSM Value S-57 Index S-57 Long Value
known 1 depth known
unknown 2 depth unknown - You should never use this value, just omit the depth=* tag
doubtful 3 doubtful sounding
unreliable 4 unreliable sounding
no_bottom 5 no bottom found at value shown
least_depth_known 6 least depth known
least_depth_unknown 7 least depth unknown, safe clearance at value shown
not_surveyed 8 value reported (not surveyed)
not_confirmed 9 value reported (not confirmed)
maintained 10 maintained depth
not_maintained 11 not regularly maintained

Accuracy (SOUACC)

depth:accuracy=*
This field is a number, in metres, such as 0.6. The error is assumed to be positive and negative. The plus/minus character shall not be encoded.

Exposition (EXPSOU)

depth:exposition=*
OSM Value S-57 Index S-57 Long Value
within_range 1 within the range of depth of the surrounding depth area
shoaler 2 shoaler than the range of depth of the surrounding depth area
deeper 3 deeper than the range of depth of the surrounding depth area

Technique (TECSOU)

depth:technique=*
OSM Value S-57 Index S-57 Long Value
echo 1 found by echo- sounder
sonar 2 found by side scan sonar
multi-beam 3 found by multi-beam
diver 4 found by diver
lead-line 5 found by lead-line
wire-drag 6 swept by wire-drag
laser 7 found by laser
acoustic 8 swept by vertical acoustic system
electromagnetic 9 found by electromagnetic sensor
photogrammetry 10 photogrammetry
satellite_imagery 11 satellite imagery
levelling 12 found by levelling
sonar 13 swept by side-scan sonar
computer_generated 14 computer generated
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