Go package for parsing bounding box strings.
You will need to have both Go and the make programs installed on your computer. Assuming you do just type:
make bin
All of this package's dependencies are bundled with the code in the vendor directory.
package main
import (
"flag"
"fmt"
"github.com/whosonfirst/go-whosonfirst-bbox/parser"
"log"
)
func main() {
var bbox = flag.String("bbox", "", "A bounding box conforming to its scheme.")
var scheme = flag.String("scheme", "cardinal", "A scheme describing how the bounding box is formatted. Valid options include: cardinal,marc.")
var order = flag.String("order", "swne", "The order in which (cardinal) coordinates are defined. Valid options are: swne,wsen,nwse.")
var separator = flag.String("separator", ",", "The string character used to seperate (cardinal) coordinates.")
flag.Parse()
p, err := parser.NewParser()
if err != nil {
log.Fatal(err)
}
p.Scheme = *scheme
p.Order = *order
p.Separator = *separator
bb, err := p.Parse(*bbox)
if err != nil {
log.Fatal(err)
}
fmt.Print(bb)
}
Bounding boxes defined as four cardinal coorindates.
MARC 034 - Coded Cartographic Mathematical Data encoded bounding boxes.
The order in which cardinal coordinates are defined.
min Y, min X, max Y, max X
min X, min Y, max X, max Y
max Y, min X, min Y, max X
Parse a bounding box string on the command line.
./bin/parse-bbox -h
Usage of ./bin/parse-bbox:
-bbox string
A bounding box conforming to its scheme.
-order string
The order in which (cardinal) coordinates are defined. Valid options are: swne,swen,nwse,nwes. (default "swne")
-scheme string
A scheme describing how the bounding box is formatted. Valid options include: cardinal,marc. (default "cardinal")
-separator string
The string character used to seperate (cardinal) coordinates. (default ",")
As of this writing all results are returned as cardinal coordinates using the SWNE scheme.
Parse a (swlon,swlat,nelon,nelat) bounding box:
./bin/parse-bbox -bbox '-120.683022988, 51.173603058, -59.6136767005, 83.3362128' -order wsen
51.173603 -120.683023 83.336213 -59.613677
Parsing a MARC bounding box:
./bin/parse-bbox -bbox '1#$aa$ba$dE1414646$eE1414646$f0315114$g0315114' -scheme marc
-32.083333 142.533333 32.083333 142.533333
Ask an HTTP pony to parse a bounding box string.
./bin/parse-bbox-server -h
Usage of ./bin/parse-bbox-server:
-host string
The hostname to listen for requests on (default "localhost")
-port int
The port number to listen for requests on (default 8080)
./bin/parse-bbox-server
$> python
>>> import requests
>>> import json
>>> url = "http://localhost:8080"
>>> params = { "bbox": "1#$aa$ba$dE1414646$eE1414646$f0315114$g0315114", "scheme": "marc"}
>>> rsp = requests.get(url, params=params)
>>> data = json.loads(rsp.content)
>>> print data
{u'min_x': 142.53333333333333, u'min_y': -32.083333333333336, u'max_x': 142.53333333333333, u'max_y': 32.083333333333336}