CODEWITHSUNDEEP
htmlregexvalidation
Steve Lloyd
Steve Lloyd

Reputation: 949

input pattern for latitude longitude validation

I am trying to get the HTML5 input pattern attribute to validate a latitude longitude string as follows: [29.71620257395901,-95.42931508327673]

Cannot seem to get the expression quiet right...

<input type="text" name="latlon" pattern="/\[[+-]?([0-9]*[.])?[0-9]+\,[+-]?([0-9]*[.])?[0-9]+$/" />

Upvotes: 1

Views: 2125

Answers (2)

Amesh Jayaweera
Amesh Jayaweera

Reputation: 226

Latitude should lie between -90 to 90 and Longitude should lie between -180 to 180

So, the following regex will help to validate with latitude and longitude valid ranges

\[(\+|\-|)(([0-8]\d?)(\.\d+)?|90(\.0+)?)\,(\+|\-|)((\d?\d|1[0-7]\d)(\.\d+)?|180(\.0+)?)\]

Test Cases

[89.438483,67.348389] -  Valid
[90.39393,178.000] -  Invalid
[0.347347,78.49494] - Valid
[-20.5858,90.889] - Valid
[-78,-179] - Valid
[-78.48348,180.00] - Valid
[-78.384844,180.44] - Invalid

Regex Demo - https://regexr.com/61rnl

Upvotes: 3

The fourth bird
The fourth bird

Reputation: 163207

You could use

\[[+-]?[0-9]*\.?[0-9]+,[+-]?[0-9]*\.?[0-9]+]

Note that with all the optional parts, it can also match .42931508327673

Regex demo

Upvotes: 1

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