I’ve had excellent results using jpeg YCBR in geotiff compression. It make small files, supports overviews and is fast. Building a custom overview layer is a good idea and save a lot in response time over opening a large number if files.
-Steve W Sent from my iPhone > On Nov 6, 2018, at 1:24 PM, Ziegler Stefan <[email protected]> wrote: > > Hi > > We are using MapServer for vector data stored in a PostgreSQL/PostGIS > database. For a new project we are planning to provide a WMS based on raster > layers and therefore in need of some performance hints or your experiences. > > The raw data will be a lot of single GeoTIFF (aerials, hillshading, slopes, > etc.) files, like 5'000 - 10'000 from different organizations. Since the > originate from different organizations it's possible that they can have > different resolutions. Conceptionally for aerials it would look like this: > > Aerial group > |_ aerial from organization one (1000 single tiffs, resolution 10cm, approx > 10k x 10k pixels) > |_ aerial from organization two (600 single tiffs, resolution, 12.5 cm, > approx 10k x 10k pixels) > |_ aerial from organization three (3000 single tiffs, resolution, 10 cm, > approx 10k x 10k pixels) > > For some hundred single GeoTIFFs we have good experience with the Tileindex > approach and an handmade external overview that kicks in at smaller scale. > > Will this approach still work with a massive amount of single tiffs? Or are > the better ones? What about the compression (quality vs. decompression speed > vs. disk space?) Or would you expect a much better performance with - let's > say - a BigTIFF for each organisation? > > Thanks for any hints. > > Best regards > Stefan > > Freundliche Grüsse > > Stefan Ziegler > Kantonsgeometer / Leiter Amt für Geoinformation > > Amt für Geoinformation > Rötistrasse 4 > 4500 Solothurn > > Telefon +41 32 627 75 96 > [email protected] > http://www.so.ch > > > _______________________________________________ > mapserver-users mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/mapserver-users
