https://github.com/daandesmedt/phpwktparser

PHPWKTParser provides a simple usage helper class to read WKT and EWKT and parse this text representation to a workable PHP array holding the parsed WKT/EWKT definition. Read and parse 2D, 3D and 4D WKT (Well Known Text) / EWKT (Extended Well-Known Text) object strings into geometry objects with this simple WKT PHP adapter library.
https://github.com/daandesmedt/phpwktparser

ewkt geometric-shapes geometry php php7 spatial well-known-text wkt wkt-strings

Last synced: 13 days ago
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PHPWKTParser provides a simple usage helper class to read WKT and EWKT and parse this text representation to a workable PHP array holding the parsed WKT/EWKT definition. Read and parse 2D, 3D and 4D WKT (Well Known Text) / EWKT (Extended Well-Known Text) object strings into geometry objects with this simple WKT PHP adapter library.

• Host: GitHub
• URL: https://github.com/daandesmedt/phpwktparser
• Owner: DaanDeSmedt
• License: mit
• Created: 2019-07-19T08:14:03.000Z (over 5 years ago)
• Default Branch: dev
• Last Pushed: 2023-11-24T14:56:14.000Z (about 1 year ago)
• Last Synced: 2024-04-26T02:21:27.849Z (8 months ago)
• Topics: ewkt, geometric-shapes, geometry, php, php7, spatial, well-known-text, wkt, wkt-strings
• Language: PHP
• Size: 9.77 KB
• Stars: 0
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
PHPWKTParser

===============

Well-known text (WKT) is a text markup language for representing vector geometry objects on a map, spatial reference systems of spatial objects and transformations between spatial reference systems.

EWKT (Extended Well-Known Text), a PostGIS-specific format that includes the spatial reference system identifier (SRID) and up to 4 ordinate values (XYZM), is also supported (ex: `SRID=31370;POINT(44 60)`).

`PHPWKTParser` provides a simple usage helper class to read WKT and EWKT and parse this text representation to a workable PHP array holding the parsed WKT/EWKT definition. Read and parse 2D, 3D and 4D WKT (Well Known Text) / EWKT (Extended Well-Known Text) object strings into geometry objects with this simple WKT PHP adapter library.

## Installation

Install the package through [composer](http://getcomposer.org):

```

composer require daandesmedt/phpwktadapter

```

Make sure, that you include the composer [autoloader](https://getcomposer.org/doc/01-basic-usage.md#autoloading) somewhere in your codebase.

## Supported geometry 

| Geometry Type	|   Example     |

| --- | --- |

| POINT         | POINT(30 10) |

| LNESTRING     | LINESTRING(30 10, 10 30, 40 40) |

| POLYGON | POLYGON((0 0,10 0,10 10,0 10,0 0)) |

| MULTIPOINT | MULTIPOINTZM(0 0 10 10,10 0 0 0,10 10 0 0,20 20 0 10) |

| MULTILINESTRING | MULTILINESTRING((0 0,10 0,10 10,0 10)) |

| MULTIPOLYGON | MULTIPOLYGON(((40 40, 20 45, 45 30, 40 40)), ((20 35, 10 30, 10 10, 30 5, 45 20, 20 35), (30 20, 20 15, 20 25, 30 20))) |

| GEOMETRYCOLLECTION | GEOMETRYCOLLECTION(POINT(10 20),LINESTRING(0 0,10 0)) |

## PHPWKTParser parsed and returned geometry array response

The `read($wkt)` function of the `PHPWKTParser` adapter will return a associative array as representation of the parsed WKT/EWKT (in case of valid).

```

array(

    // the geometry object type

    "type"      =>  string,

    // integer or float values for POINT - nested array (integer or float) for other geometry types

    "value"     =>  array,

    // integer representing the EWKT SRID, null when not present 

    "srid"      =>  integer | null,

    // string (Z, M or ZM) representing the dimension, null when not present 

    "dimension" =>  string | null

)

```

## Working examples

Working examples can be found in the `examples` folder.

## Sample usage

```php

read('SRID=31370;POINT(30 10)');

var_dump($res); 

```

## Handling exceptions

Invalid format in the specified WKT / EWKT will result in a `UnexpectedValueException` thrown by the `WKTAdapter` .

```php

read('SRID=31370;POINT(bad format)');

} catch (UnexpectedValueException $e) {

    var_dump($e->getMessage());

}

```