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Add comparison tagsfilter with <=, >=, < and >

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Pieter Vander Vennet 2021-07-27 13:44:05 +02:00
parent 7c03a185ac
commit d9cc99c447
5 changed files with 137 additions and 37 deletions
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Docs/Tags_format.md
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@ -29,6 +29,16 @@ To check if a key does _not_ equal a certain value, use `key!=value`. This is co
This implies that, to check if a key is present, `key!=` can be used. This will only match if the key is present and not empty.
Number comparison
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If the value of a tag is a number (e.g. `key=42`), one can use a filter `key<=42`, `key>=35`, `key>40` or `key<50` to match this, e.g. in conditions for renderings.
These tags cannot be used to generate an answer nor can they be used to request data upstream from overpass.
Note that the value coming from OSM will first be stripped by removing all non-numeric characters. For example, `length=42 meter` will be interpreted as `length=42` and will thus match `length<=42` and `length>=42`.
In special circumstances (e.g. `surface_area=42 m2` or `length=100 feet`), this will result in erronous values (`surface=422` or if a length in meters is compared to).
However, this can be partially alleviated by using 'Units' to rewrite to a default format.
Regex equals
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