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<div style="color: rgb(0, 0, 0); font-size: 14px;"><font face="Helvetica">Thanks, I used the authoritative sources and made the math myself. </font></div>
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<div><font face="Helvetica"><font>I believe the OSM website at [2] should be fixed accordingly. The radius used in the sources [1, and elsewhere] is in fact as expected the WGS_84 sphere of radius </font><span style="white-space: pre; background-color: rgb(255, 255, 255);">6378137.0.
It means the radius (which is said to be </span><span style="background-color: rgb(255, 255, 255);">6372.7982 km, that¡¯s about 40 km missing at the equator)</span><span style="white-space: pre; background-color: rgb(255, 255, 255);"> and tile sizes at [2]
should be fixed for others who want to do funny things and get mislead by these values.
</span></font></div>
<div><span style="white-space: pre; background-color: rgb(255, 255, 255);"><font face="Helvetica"><br>
</font></span></div>
<div><font face="Helvetica"><span style="background-color: rgb(255, 254, 254);"><span style="white-space: pre;">I also believe the degree column should be removed from the table. Because the tiling scheme is a tile pyramid, where the tile sizes are cut in half
for each subsequent level. That isn't the same as cutting the degree into half as shown in the table. For example, the length at zoom level 19 for 0.0005¡Æ at the equator is
</span></span><span style="background-color: rgb(255, 255, 255);"><span style="white-space: nowrap;">0.21742088 using haversine – and not </span></span><span style="white-space: nowrap; background-color: rgb(255, 255, 255);">0.29858214 which is the value you
get cutting the extent into halfs.</span></font></div>
<div><span style="white-space: pre; background-color: rgb(255, 255, 255);"><font face="Helvetica"><br>
</font></span></div>
<div><font face="Helvetica"><span style="white-space: pre; background-color: rgb(255, 254, 254);">So the page should be updated to (note the different sphere and m/ pixel values</span><span style="white-space: pre; background-color: rgb(255, 254, 254);">):</span></font></div>
<div><span style="white-space: pre; background-color: rgb(255, 255, 255);"><font face="Helvetica">sphere: 6378137.0</font></span></div>
<div><font face="Helvetica"><span style="white-space: pre;">The math for m</span><span style="white-space: pre; background-color: rgb(255, 254, 254);"> / pixel is:</span></font></div>
<div><font face="Helvetica">z0: (6378137 * 2 * pi) / 256</font></div>
<div><font face="Helvetica">z1: (6378137 * 2 * pi) / 256 / 2</font></div>
<div>¡¦</div>
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<table class="wikitable" style="font-size: 13px; margin: 1em 0px; background-color: rgb(249, 249, 249); border: 1px solid rgb(170, 170, 170); border-collapse: collapse; color: black; font-family: sans-serif;">
<tbody>
<tr>
<th style="padding: 0.2em 0.4em; background-color: rgb(242, 242, 242); border: 1px solid rgb(170, 170, 170); text-align: center;">
<font size="3">Level </font></th>
<th style="padding: 0.2em 0.4em; background-color: rgb(242, 242, 242); border: 1px solid rgb(170, 170, 170); text-align: center;">
<font size="3">Degree </font></th>
<th style="padding: 0.2em 0.4em; background-color: rgb(242, 242, 242); border: 1px solid rgb(170, 170, 170); text-align: center;">
<font size="3">Area </font></th>
<th style="padding: 0.2em 0.4em; background-color: rgb(242, 242, 242); border: 1px solid rgb(170, 170, 170); text-align: center;">
<font size="3">m / pixel </font></th>
<th style="padding: 0.2em 0.4em; background-color: rgb(242, 242, 242); border: 1px solid rgb(170, 170, 170); text-align: center;">
<font size="3">~Scale</font></th>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">0 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>360<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">whole world </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">156543.033928</span> </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:500 million</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>180<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">78271.516964</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:250 million</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">2 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>90<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">39135.758482</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:150 million</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">3 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>45<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">19567.879241</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:70 million</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">4 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>22.5<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">9783.9396205</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:35 million</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">5 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>11.25<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">4891.96981025</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:15 million</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">6 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>5.625<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">2445.98490513</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:10 million</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">7 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>2.813<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">1222.99245256</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:4 million</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">8 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>1.406<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">611.49622628</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:2 million</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">9 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.703<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">wide area </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">305.74811314</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:1 million</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">10 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.352<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">152.87405657</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:500,000</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">11 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.176<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">area </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">76.43702828</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:250,000</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">12 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.088<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">38.21851414</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:150,000</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">13 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.044<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">village or town </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">19.10925707</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:70,000</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">14 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.022<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">9.55462853</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:35,000</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">15 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.011<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">4.77731426</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:15,000</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">16 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.005<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">small road </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">2.38865713</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:8,000</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">17 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.003<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">1.19432856</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:4,000</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">18 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.001<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">0.59716428</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:2,000</font></td>
</tr>
<tr>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">19 </font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="visibility: hidden;"></span>0.0005<span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 255, 255);">0.29858214</span><span style="visibility: hidden;"></span></font></td>
<td style="padding: 0.2em 0.4em; border: 1px solid rgb(170, 170, 170);"><font size="3">1:1,000</font></td>
</tr>
</tbody>
</table>
</div>
<div style="color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-size: 14px;">
<span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; font-size: 30px; white-space: nowrap; background-color: rgb(255, 255, 255);"><br>
</span></div>
<div style="color: rgb(0, 0, 0); font-family: Calibri, sans-serif;"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 254, 254);">Ben</span></div>
<div style="color: rgb(0, 0, 0); font-family: Calibri, sans-serif;"><span style="color: rgb(34, 34, 34); font-family: Roboto-Regular, helvetica, arial, sans-serif; white-space: nowrap; background-color: rgb(255, 254, 254);"><br>
</span></div>
<div style="color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-size: 14px;">
[1] <a href="https://github.com/openstreetmap/mod_tile/blob/6b9611aaf763f4f776d1fd363433aac7e25cb34b/src/gen_tile.cpp">
https://github.com/openstreetmap/mod_tile/blob/6b9611aaf763f4f776d1fd363433aac7e25cb34b/src/gen_tile.cpp</a></div>
<div style="color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-size: 14px;">
[2] <a href="http://wiki.openstreetmap.org/wiki/Zoom_levels">http://wiki.openstreetmap.org/wiki/Zoom_levels</a></div>
<div style="color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-size: 14px;">
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<span style="font-weight:bold">Von: </span>Kom–pa <<a href="mailto:me@komzpa.net">me@komzpa.net</a>><br>
<span style="font-weight:bold">Datum: </span>Samstag, 18. Juni 2016 um 07:38<br>
<span style="font-weight:bold">An: </span>Benjamin Stadin <<a href="mailto:benjamin.stadin@heidelberg-mobil.com">benjamin.stadin@heidelberg-mobil.com</a>>, OSM Dev List <<a href="mailto:dev@openstreetmap.org">dev@openstreetmap.org</a>><br>
<span style="font-weight:bold">Betreff: </span>Re: [OSM-dev] Earth radius<br>
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<div dir="ltr">Hi,
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<div>OSM uses EPSG:4326 for storing coordinates and EPSG:3857 for rendering.<br>
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You can get projection definitions on <a href="http://epsg.io/4326">http://epsg.io/4326</a> and
<a href="http://epsg.io/3857">http://epsg.io/3857</a> respectively, or find it bundled with proj4 library that is widely used to deal with projection nuances. <br>
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<div dir="ltr">¬ã¬Ò, 18 ¬Ú¬ð¬ß. 2016 ¬Ô. ¬Ó 1:37, Stadin, Benjamin <<a href="mailto:Benjamin.Stadin@heidelberg-mobil.com">Benjamin.Stadin@heidelberg-mobil.com</a>>:<br>
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<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi,<br>
<br>
I want to double check the earth radius used by OSM and zoom levels is<br>
exactly 6372.7982 as said here:<br>
<a href="http://wiki.openstreetmap.org/wiki/Zoom_levels" rel="noreferrer" target="_blank">http://wiki.openstreetmap.org/wiki/Zoom_levels</a>.<br>
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I couldn©öt find this as constant in the sources yet. I©öm creating a new<br>
storage system for vector tiles, independent of a projection.<br>
<br>
Best<br>
Ben<br>
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