<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 10pt; color: #330099'><style>p { margin: 0; }</style><div style="font-family: Arial; font-size: 10pt; color: #330099"><span>Hello list,<br><br>I have a set of tiles at resolution 0.5 m/pxl. Based on this data, I'd like to create a pyramid that has zoom levels 0.166667, 0.333333, 0.666667 and 1.66667 (the data will only be viewed in geoserver at these levels, so I guess it will be faster if I prepare the data at these levels). <br><br>I think gdal_retile only allows multiplying the zoom levels by 2. Thus I think I will need those steps :<br></span><ol><li>gdal_translate to get the lowest zoom level (0.5 --> 0.166667)</li><li>gdal_retile to give these tiles the good size in pixels, mosaic them and to create the next two levels (0.333333 and 0.666667)</li><li>gdal_translate again to get the highest zoom level (1.66667, which is not the double of the previous one) starting from the 0.666667 tiles.<br></li><li>gdal_retile again to give these tiles the good size in pixels and mosaic them</li><li>manually adapt the pyramid config files</li></ol>At 0.5 m/pxl, I have 8000 geotiffs each 4000 x 4000 pxls, so I think it'll take a lot of time, especially steps 1 and 2. <br><br>Would you have an advice to speed up the process or decrease the number of steps ?<br><br>Alain<br><br><br><span id="c00e9474-0102-49d2-ba75-8c6cc2ac78c3"><span></span><br></span><br></div></div></body></html>