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Back out attempt to commit partial support for POIs as this is not at

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all ready for prime time yet.
This commit is contained in:
Tom Hughes 2008-01-08 18:23:56 +00:00
parent 6a7ae38d80
commit a31e61169c
2 changed files with 0 additions and 104 deletions
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54
app/views/site/index.rhtml
View file

@ -115,65 +115,11 @@ by the OpenStreetMap project and it's contributors.
map.events.register("moveend", map, updateLocation); map.events.register("moveend", map, updateLocation);
map.events.register("changelayer", map, updateLocation); map.events.register("changelayer", map, updateLocation);
map.events.register("click", map, mapClick);
updateLocation(); updateLocation();
handleResize(); handleResize();
} }
// Map click results in feature lookup
function mapClick(e) {
var pos = lonLatToNonSphericalMercator
(mercatorToLonLat
(map.getLonLatFromViewPortPx
( map.events.getMousePosition(e))));
// put in the freemap url for the moment. this will be replaced
// by a ruby equivalent.
/*
url= 'http://www.free-map.org.uk/freemap/common/osmlookup.php?'+
'action=get&x='+pos.lon+'&y='+pos.lat;
OpenLayers.loadURL(url,/null, null,osmLookupCallback);
*/
}
// the feature lookup finds the nearest POI node, or, if no node could
// be found, the nearest way
/*
function osmLookupCallback (xmlHTTP) {
var nodes = xmlHTTP.responseXML.getElementsByTagName('node');
var ways = xmlHTTP.responseXML.getElementsByTagName('way');
var features = (ways.length==1) ? ways:nodes;
if(features.length==1) {
var osm_id = features[0].getElementsByTagName('osm_id')[0].
firstChild.nodeValue;
var name =
(xmlHTTP.responseXML.getElementsByTagName('name').length>0) ?
xmlHTTP.responseXML.getElementsByTagName('name')[0].
firstChild.nodeValue: "";
if(this.osm_type=='way' && ways.length==1) {
// use openlayers vector layer to highlight way for editing?
}
var description="";
var wikipedia="";
var ad=false;
if(xmlHTTP.responseXML.getElementsByTagName('description').length){
osmdesc=
xmlHTTP.responseXML.getElementsByTagName('description')[0].
firstChild.nodeValue;
description += "<p>"+osmdesc+"</p>";
}
}
}
*/
function getPosition() { function getPosition() {
return mercatorToLonLat(map.getCenter()); return mercatorToLonLat(map.getCenter());
} }

50
public/javascripts/map.js
View file

@ -146,56 +146,6 @@ function lonLatToMercator(ll) {
return new OpenLayers.LonLat(lon, lat); return new OpenLayers.LonLat(lon, lat);
} }
// for interacting with the PostGIS database which uses non spherical
// Mercator. Taken from Freemap which in turn was taken from a standard
// algorithm off the net.
function lonLatToNonSphericalMercator(ll) {
var custLat = ll.lat * (Math.PI/180);
var a = 6378137;
var b = 6356752.3142;
var f = (a-b)/a;
var e = Math.sqrt(2*f-Math.pow(f,2));
custLat=a*Math.log(Math.tan(Math.PI/4+custLat/2)*
Math.pow(( (1-e*Math.sin(custLat)) / (1+e*Math.sin(custLat))),e/2));
custLon = ll.lon * (Math.PI/180) * 6378137;
return new OpenLayers.LonLat (custLon,custLat);
}
function nonSphericalMercatorToLonLat(merc) {
var lon_deg, lat_deg;
var a = 6378137.0;
var b = 6356752.3142;
var k0 = 1.0;
var t = 1.0 - b/a;
var es = 2*t - t*t;
var e = Math.sqrt(es);
lon_deg = merc.lon;
lat_deg = merc.lat;
lon_deg /= a;
lat_deg /= a;
lon_deg /= k0;
lat_deg = phi2(Math.exp(-lat_deg/k0), e);
lon_deg *= (180/M_PI);
lat_deg *= (180/M_PI);
return new OpenLayers.LonLat(lon_deg,lat_deg);
}
function phi2 (ts,e) {
var eccnth = 0.5*e;
var Phi = (PI/2) - 2.0*Math.atan(ts);
var dphi;
var i=15;
do {
var con = e*Math.sin(Phi);
dphi = (PI/2) - 2.0*Math.atan(ts*Math.pow((1.0-con)/(1.0+con),eccnth))
- Phi;
Phi += dphi;
}
while(Math.abs(dphi) > 0.0000000001 && --i);
return Phi;
}
function scaleToZoom(scale) { function scaleToZoom(scale) {
return Math.log(360.0/(scale * 512.0)) / Math.log(2.0); return Math.log(360.0/(scale * 512.0)) / Math.log(2.0);
} }