9. Perguntas mais frequentes
Quais são as diferenças entre o QGIS Desktop e o Servidor QGIS?
QGIS Desktop has a graphical user interface and allows you to create and modify maps. QGIS Server is a server application serving your QGIS project files to end user applications via OGC web services like WMS, WFS, etc..
What is OGC?
The OGC (Open Geospatial Consortium) is an international not for profit organization committed to making quality open standards for the global geospatial community.
Name some other web mapping servers?
ArcGIS server, Geoserver, Mapserver, Mapnik etc.
How to compare QGIS server to other web mapping servers? (2021/01/01)
Feições
Servidor QGIS
GeoServer
Servidor ArcGIS
Desde
2006
2001
1999
Licença
GPL
GPL
comercial
Suporte comercial
Multiple companies
Multiple companies
ESRI and its vendors network
Tecnologia
C++/python
Java
C++
Tile cache
sim
yes (via GeoWebCache)
sim
3D
Não
Não
Sim
Consultas
FES (2.0) and OGC (1.0) filters
CQL and OGC filters
OGC filters
Report generation
sim
sim
sim
Administração do servidor
yes via third parties (LizMap, QWC2, etc.)
web + API REST
web + API REST
Edição de camada/simbologia do projeto GIS
complete via dedicated GUI
simple via web interface
complete via dedicated GUI
What are the OGC specification versions implemented in QGIS server compared to other web mapping servers? (2021/01/01)
OGC standards
Servidor QGIS
GeoServer
Servidor ArcGIS
WMS (Web Map Service)
1.3.0 - 1.1.1
1.3.0 - 1.1.1
1.3.0 - 1.1.1
SRW (Serviço de Recursos da Web)
1.1.0 - 1.0.0
2.0.0 - 1.0.0
2.0.0 - 1.0.0
OAPIF (aka WFS3)
1.0.0
não
não
WMTS (Web Map Tile Service)
1.0.0
1.0.0
1.0.0
WCS (Web Coverage Service)
1.0.0
2.0.1 - 1.0.0
2.0.1 - 1.0.0
WPS (Web Processing Service)
não
1.0.0
1.0.0
SCW (Serviço de Catálogo para a Web)
não
2.0.2
não
SLD (Styled Layer Descriptor)
sim
sim
sim
What is a tile cache?
Maps are often static. As most mapping clients render WMS (Web Map Service) data every time they are queried, this can result in unnecessary processing and increased wait times.
The tile cache optimizes this experience by saving (caching) map images, or tiles, as they are requested, in effect acting as a proxy between client (such as OpenLayers or Google Maps) and server (any WMS-compliant server). As new maps and tiles are requested, QGIS server intercepts these calls and returns pre-rendered tiles if stored, or calls the QGIs engine to render new tiles as necessary. Thus, once tiles are stored, the speed of map rendering increases by many times, creating a much improved user experience.
What is PostgreSQL?
PostgreSQL <https://www.postgresql.org/>`_ é um poderoso e de código aberto companheiro de banco de dados objeto-relacional para QGIS.
O que é PostGIS?
PostGIS is a spatial database extender for PostgreSQL object-relational database. It adds support for geographic objects allowing location queries to be run in SQL.
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