1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
#!/usr/bin/perl
#
# Utils.pm:
# Various generic utilities for FixMyStreet.
#
# Copyright (c) 2008 UK Citizens Online Democracy. All rights reserved.
# Email: matthew@mysociety.org; WWW: http://www.mysociety.org/
#
# $Id: Utils.pm,v 1.1 2008-10-09 14:20:54 matthew Exp $
#
package Utils;
use strict;
use mySociety::DBHandle qw(dbh);
use mySociety::GeoUtil;
sub workaround_pg_bytea {
my ( $st, $img_idx, @elements ) = @_;
my $s = dbh()->prepare($st);
for ( my $i = 1 ; $i <= @elements ; $i++ ) {
if ( $i == $img_idx ) {
$s->bind_param(
$i,
$elements[ $i - 1 ],
{ pg_type => DBD::Pg::PG_BYTEA }
);
}
else {
$s->bind_param( $i, $elements[ $i - 1 ] );
}
}
$s->execute();
}
=head2 convert_en_to_latlon
( $latitude, $longitude ) = Utils::convert_en_to_latlon( $easting, $northing );
Takes the easting and northing and returns latitude and longitude.
=cut
sub convert_en_to_latlon {
my ( $easting, $northing ) = @_;
my ( $latitude, $longitude ) =
# map { truncate_coordinate($_) }
mySociety::GeoUtil::national_grid_to_wgs84( $easting, $northing, 'G' );
return ( $latitude, $longitude );
}
=head2 convert_en_to_latlon_truncated
( $lat, $lon ) = Utils::convert_en_to_latlon( $easting, $northing );
Takes the easting and northing and returns latitude and longitude (truncated
using C<Utils::truncate_coordinate>).
=cut
sub convert_en_to_latlon_truncated {
my ( $easting, $northing ) = @_;
return
map { truncate_coordinate($_) }
convert_en_to_latlon( $easting, $northing );
}
=head2 truncate_coordinate
$short = Utils::truncate_coordinate( $long );
Given a long coordinate returns a shorter one - rounded to 6 decimal places -
which is < 1m at the equator.
=cut
sub truncate_coordinate {
my $in = shift;
my $out = sprintf( '%0.6f', $in );
$out =~ s{\.?0+\z}{} if $out =~ m{\.};
return $out;
}
1;
|
