pushing the envelope… new and innovative ways to leverage open source toolkits for the erma portal...
TRANSCRIPT
Pushing the envelope…
New and innovative ways to leverage Open Source Toolkits
for the ERMA portal
Aaron Racicot (Z-Pulley Inc)Dane Springmeyer (DBSGeo)
Z-Pulley Inc - DBSGeo2
Architecture
Current Architecture
Z-Pulley Inc - DBSGeo3
Data Layer
Modeling/AnalysisLayer
User InterfaceLayer
USER USERUser Interface
(Custom HTML/JS and Openlayers)
Internet
Web Server (Apache/mod_perl)
???
Database (PostgreSQL/PostGIS) & File Server (Linux - Fedora)
GIS (Mapserver)
Custom Perl Module
SERV
ER
Architecture Direction
• Consolidation of Languages– Migrate to Python where it makes sense
• Integrate frameworks– GeoDjango – Authentication, REST Services, Admin– GeoExt – UI Layout, Cross Platform Support
• Increase ease of deployment– Automate with install scripts– Reduce dependencies
Z-Pulley Inc - DBSGeo4
Possible Future Architecture
Z-Pulley Inc - DBSGeo5
Data Layer
Modeling/AnalysisLayer
User InterfaceLayer
USER USERUser Interface
(GeoExt and Openlayers)
Internet
Web Server (Apache/mod_python)
Integration Framework(Python)
Database (PostgreSQL/PostGIS) & File Server (Linux - Ubuntu)
GIS (Mapserver/Mapnik)
Framework (GeoDjango)
SERV
ER
Current Short List• Shortcuts for speed
– Server/Connection speed– Faster map requests via Caching (TileCache)– Database optimization (indexing, normalization)– Avoid on-the-fly reprojection – Harmonize into common projection
• Frameworks and Libraries for:– Security
• Wrapping WMS/WFS services in authentication framework– Cross Platform Support
• Get IE support enabled– UI Layout optimization
• Increase map size• Online help
• Increased print functionality
Z-Pulley Inc - DBSGeo6
Current Long List
• Batch uploads• Search and Query capability• Enhanced Reporting• Incorporate 3rd party datasets (IOOS etc), both
WMS/WFS/WCS• Custom groups for categorizing users, AOI’s, visible
datasets, etc.• Bookmarks for quickly allowing users to scale to a
project scope in the interface
Z-Pulley Inc - DBSGeo7
Z-Pulley Inc - DBSGeo8
Speed
Z-Pulley Inc - DBSGeo9
Tile Serving with TileCacheUser Interface
(OpenLayers)
Internet
Web Server (Apache)
Database (PostgreSQL/PostGIS)
GIS (Mapserver/Mapnik)
TileCache
http://labs.metacarta.com/wms-c/tilecache.py/1.0.0/basic/5/32/23.png
Cache Miss
Disk Cache
User Interface (OpenLayers)
Internet
Web Server (Apache)
Database (PostgreSQL/PostGIS)
GIS (Mapserver/Mapnik)
TileCache
http://labs.metacarta.com/wms-c/tilecache.py/1.0.0/basic/5/32/23.png
Cache Hit
Z-Pulley Inc - DBSGeo10
Z-Pulley Inc - DBSGeo11
ProjectionsUser Interface
(OpenLayers)
Internet
Web Server (Apache)
Database (PostgreSQL/PostGIS)
GIS (Mapserver/Mapnik)
http://labs.metacarta.com/wms-c/tilecache.py/1.0.0/basic/5/32/23.png
Proj4
Proj Mismatch
User Interface (OpenLayers)
Internet
Web Server (Apache)
Database (PostgreSQL/PostGIS)
GIS (Mapserver/Mapnik)
http://labs.metacarta.com/wms-c/tilecache.py/1.0.0/basic/5/32/23.png
Proj4
Proj Match
Z-Pulley Inc - DBSGeo12
Z-Pulley Inc - DBSGeo13
Frameworks
ExtJS GeoExt
Z-Pulley Inc - DBSGeo14
Django GeoDjango
Z-Pulley Inc - DBSGeo15
Z-Pulley Inc - DBSGeo16
Rendering
Mapserver Mapnik
Z-Pulley Inc - DBSGeo17