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Slippy Export tab embeddable html bbox extents error #1074

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openstreetmap-trac opened this issue Jul 23, 2021 · 1 comment
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Slippy Export tab embeddable html bbox extents error #1074

openstreetmap-trac opened this issue Jul 23, 2021 · 1 comment
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Component: mapnik Priority: trivial Resolution: invalid Type: defect

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Reporter: merdin
[Submitted to the original trac issue database at 9.49am, Saturday, 26th July 2008]

I was exporting an embeddable html link for a map of a point in Maputo Mozambique and noticed that the link did not retain the proper bounding box. It seems the north and south latitude coordinates are reversed in the output from the export link, causing the embedded map to display the whole world rather than the appropriate bounding box.

Perhaps because the coords are negative (southern hemisphere) they are being sorted to the wrong order?

Default output:

<iframe width="425" height="350" frameborder="0" scrolling="no" 
    marginheight="0" marginwidth="0" 
    src="http://www.openstreetmap.org/export/embed.html?bbox=32.58301,-25.97939,32.58805,-25.97454&layer=mapnik&marker=-25.97551,32.58475" 
    style="border: 1px solid black">
</iframe>
<br />
<small>
    <a href="http://www.openstreetmap.org/?lat=-25.976965&lon=32.585530000000006&zoom=16&layers=B00FTFTT&mlat=-25.97551&mlon=32.58475">View Larger Map</a>
</small>

Corrected North/South Coords Swapped

<iframe width="425" height="350" frameborder="0" scrolling="no" 
    marginheight="0" marginwidth="0" 
    src="http://www.openstreetmap.org/export/embed.html?bbox=32.58301,-25.97454,32.58805,-25.97939&layer=mapnik&marker=-25.97551,32.58475" 
    style="border: 1px solid black">
</iframe>
<br />
<small>
    <a href="http://www.openstreetmap.org/?lat=-25.976965&lon=32.585530000000006&zoom=16&layers=B00FTFTT&mlat=-25.97551&mlon=32.58475">View Larger Map</a>
</small>

I hope slippy map is the right place to assign this error ... but I am new here, so I don't really know the names of different components very well. Great project overall though, thanks for the hard work
@openstreetmap-trac openstreetmap-trac self-assigned this Jul 23, 2021
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Author: tom[at]compton.nu
[Added to the original trac issue at 11.06pm, Saturday, 26th July 2008]

They're not reversed - the first one is the latitude of the bottom of the map and the second is the latitude of the top of the map. In the southern hemisphere that means the first one is more negative than the second.

What's more it seems to work for me - I get a map of the expected area not of the whole world.

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Component: mapnik Priority: trivial Resolution: invalid Type: defect
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