RMVirtualEarthSource.m
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//
// RMVirtualEarthURL.m
//
// Copyright (c) 2008, Route-Me Contributors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#import "RMVirtualEarthSource.h"
@implementation RMVirtualEarthSource
-(NSString*) tileURL: (RMTile) tile
{
NSString *quadKey = [self quadKeyForTile:tile];
return [self urlForQuadKey:quadKey];
}
-(NSString*) quadKeyForTile: (RMTile) tile
{
NSMutableString *quadKey = [NSMutableString string];
for (int i = tile.zoom; i > 0; i--)
{
int mask = 1 << (i - 1);
int cell = 0;
if ((tile.x & mask) != 0)
{
cell++;
}
if ((tile.y & mask) != 0)
{
cell += 2;
}
[quadKey appendString:[NSString stringWithFormat:@"%d", cell]];
}
return quadKey;
}
-(float) minZoom
{
return 1;
}
-(NSString*) urlForQuadKey: (NSString*) quadKey
{
NSString *mapType = @"r"; //type road
NSString *mapExtension = @".png"; //extension
//TODO what is the ?g= hanging off the end 1 or 15?
return [NSString stringWithFormat:@"http://%@%d.ortho.tiles.virtualearth.net/tiles/%@%@%@?g=15", mapType, 3, mapType, quadKey, mapExtension];
}
-(NSString*) description
{
return @"Microsoft VirtualEarth";
}
@end