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+ c++ demo: use the same map/layer srs settings as in Python demo

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This commit is contained in:
artemp 2013-01-11 14:50:49 +00:00
parent 2175112edd
commit 9659349d8a
1 changed files with 15 additions and 6 deletions
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21
demo/c++/rundemo.cpp
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@ -54,6 +54,11 @@ int main ( int argc , char** argv)
}
using namespace mapnik;
const std::string srs_lcc="+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 \
+datum=NAD83 +units=m +no_defs";
const std::string srs_merc="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 \
+lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs";
try {
std::cout << " running demo ... \n";
std::string mapnik_dir(argv[1]);
@ -64,7 +69,7 @@ int main ( int argc , char** argv)
Map m(800,600);
m.set_background(parse_color("white"));
m.set_srs(srs_merc);
// create styles
// Provinces (polygon)
@ -186,6 +191,7 @@ int main ( int argc , char** argv)
layer lyr("Provinces");
lyr.set_datasource(datasource_cache::instance().create(p));
lyr.add_style("provinces");
lyr.set_srs(srs_lcc);
m.addLayer(lyr);
}
@ -196,6 +202,7 @@ int main ( int argc , char** argv)
p["file"]="../data/qcdrainage";
layer lyr("Quebec Hydrography");
lyr.set_datasource(datasource_cache::instance().create(p));
lyr.set_srs(srs_lcc);
lyr.add_style("drainage");
m.addLayer(lyr);
}
@ -204,9 +211,9 @@ int main ( int argc , char** argv)
parameters p;
p["type"]="shape";
p["file"]="../data/ontdrainage";
layer lyr("Ontario Hydrography");
lyr.set_datasource(datasource_cache::instance().create(p));
lyr.set_srs(srs_lcc);
lyr.add_style("drainage");
m.addLayer(lyr);
}
@ -217,6 +224,7 @@ int main ( int argc , char** argv)
p["type"]="shape";
p["file"]="../data/boundaries_l";
layer lyr("Provincial borders");
lyr.set_srs(srs_lcc);
lyr.set_datasource(datasource_cache::instance().create(p));
lyr.add_style("provlines");
m.addLayer(lyr);
@ -228,6 +236,7 @@ int main ( int argc , char** argv)
p["type"]="shape";
p["file"]="../data/roads";
layer lyr("Roads");
lyr.set_srs(srs_lcc);
lyr.set_datasource(datasource_cache::instance().create(p));
lyr.add_style("smallroads");
lyr.add_style("road-border");
@ -244,13 +253,13 @@ int main ( int argc , char** argv)
p["file"]="../data/popplaces";
p["encoding"] = "latin1";
layer lyr("Populated Places");
lyr.set_srs(srs_lcc);
lyr.set_datasource(datasource_cache::instance().create(p));
lyr.add_style("popplaces");
m.addLayer(lyr);
}
m.zoom_to_box(box2d<double>(1405120.04127408,-247003.813399447,
1706357.31328276,-25098.593149577));
m.zoom_to_box(box2d<double>(-8024477.28459,5445190.38849,-7381388.20071,5662941.44855));
image_32 buf(m.width(),m.height());
agg_renderer<image_32> ren(m,buf);
@ -275,9 +284,9 @@ int main ( int argc , char** argv)
/* we could also do:
save_to_cairo_file(m,"cairo-demo.png");
save_to_cairo_file(m,"cairo-demo.png");
but instead let's build up a surface for more flexibility
but instead let's build up a surface for more flexibility
*/
cairo_surface_ptr image_surface(