NAME

Geo::GoogleEarth::Pluggable::Plugin::AsGeoJSON - PostgreSQL ST_AsGeoJSON plugin for Geo::GoogleEarth::Pluggable

SYNOPSIS

use Geo::GoogleEarth::Pluggable;
use Geo::GoogleEarth::Pluggable::Plugin::AsGeoJSON; #can be runtime loaded
my $document = Geo::GoogleEarth::Pluggable->new;
my $object   = $document->AsGeoJSON(name        => $text,
                                    description => $html,
                                    json        => $json_string,
                                    style       => $style,
                                   );

DESCRIPTION

Parses the string as returned from the PostgreSQL ST_AsGeoJSON() function as Google Earth compatible objects.

USAGE

use DBIx::Array::Connect 0.06; #path
use Geo::GoogleEarth::Pluggable 0.16; #Polygon
my $document = Geo::GoogleEarth::Pluggable->new;
my $database = DBIx::Array::Connect->new->connect('gis');

#Select data from PostgreSQL
my @gisdata  = $database->sqlarrayhash(&gis_data_sql);

#Add each row as Google Earth document object
$document->AsGeoJSON(%$_) foreach @gisdata;

#Print the Google Earth KML document
print $document->render;

sub gis_data_sql {
  return qq{
             SELECT 'Clifton, VA'                                                    AS "name", 
                    ST_AsGeoJSON(ST_GeomFromText('POINT(-77.38670068 38.78025536)')) AS "json"
           };
}

METHODS

AsGeoJSON

$document->AsGeoJSON(
                     name        => $text,            #see Placemark
                     description => $html,
                     json        => $json_string,
                     style       => $style,
                    );

JSON Example: Point

{
 "type" : "Point",
 "coordinates" : [ -77.38670068, 38.78025536 ]
}

JSON Example: Polygon

{
 "type" : "Polygon"
 "coordinates" : [
    [
       [ -77.3883082, 38.7796903 ],
       [ -77.3858487, 38.7791080 ],
       [ -77.3859173, 38.7811742 ],
       [ -77.3859710, 38.7812281 ],
       [ -77.3861322, 38.7814079 ],
       [ -77.3883082, 38.7796903 ] 
    ]
 ],
}

JSON Example: MultiPolygon

{
 "type" : "MultiPolygon"
 "coordinates" : [
    [
       [
          [ -77.3883082, 38.7796903 ],
          [ -77.3858487, 38.7791080 ],
          [ -77.3859173, 38.7811742 ],
          [ -77.3859710, 38.7812281 ],
          [ -77.3861322, 38.7814079 ],
          [ -77.3883082, 38.7796903 ] 
       ]
    ],
    [
       [
          [ -77.3857118, 38.7789067 ],
          [ -77.3852328, 38.7769665 ],
          [ -77.3843158, 38.7770731 ],
          [ -77.3850419, 38.7786809 ],
          [ -77.3857118, 38.7789067 ]
       ]
    ]
 ],
}

SEE ALSO

Geo::GoogleEarth::Pluggable, JSON::XS

AUTHOR

Michael Davis, mrdvt@cpan.org

COPYRIGHT AND LICENSE

MIT License

Copyright (c) 2021 Michael R. Davis

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.