Cette page Web utilise
Leaflet pour afficher des cartes créées à la volée par WMS version 1.3.0 ERDDAP .
La commande à gauche de la carte permet de zoomer (+) ou dézoomer (-).
Le champ de droite gère les calques.
Vous pouvez sélectionner différentes valeurs pour la ou les dimensions de la variable de données :
Le service de carte Web (WMS ) d' ERDDAP vous permet de demander une image avec des données tracées sur une carte.
WMS est un
Open Geospatial Consortium (OGC ) et
ISO (19128) norme pour « la création et l'affichage de vues d'informations de type carte enregistrées et superposées qui proviennent simultanément de plusieurs sources distantes et hétérogènes ».
See the
list
of datasets available via WMS at this ERDDAP installation.
Three Ways to Make Maps with WMS
In theory, anyone can download, install, and use WMS client software. Some clients are:
ArcGIS and
uDig.
To make a client work, you would install the software on your computer.
Then, you would enter the URL of the WMS service into the client.
For example, in ArcGIS (not yet fully working because it doesn't handle time!), use
"Arc Catalog : Add Service : Arc Catalog Servers Folder : GIS Servers : Add WMS Server".
In ERDDAP, this dataset has its own WMS service, which is located at
https://cioosatlantic.ca/erddap/fr/wms/bio_remote_sensing_modis_aqua_chl_poly4/request?
(Some WMS client programs don't want the ? at the end of that URL.)
See the
list
of datasets available via WMS at this ERDDAP installation.
In practice, we haven't found any WMS clients that properly handle dimensions
other than longitude and latitude (e.g., time), a feature which is specified by the WMS
specification and which is utilized by most datasets in ERDDAP's WMS servers.
You may find that using
Faire un graphique
and selecting the .kml file type (an OGC
standard) to load images into Google Earth provides
a good (non-WMS) map client.
See the
list
of datasets with Make A Graph at this ERDDAP installation.
Web page authors can embed a WMS client in a web page. For the map above, ERDDAP is using
Leaflet, which is a very versatile WMS client.
Leaflet doesn't automatically deal with dimensions other than longitude and latitude
(e.g., time), so you will have to write JavaScript (or other scripting code) to do that.
(Adventurous JavaScript programmers can look at the Souce Code for this web page.)
Another commonly used JavaScript WMS client is
OpenLayers.
A person with a browser or a computer program can generate special WMS URLs. For example,
In practice, it is easier, more versatile,
and more efficient to use this dataset's
Faire un graphique web page
than to use WMS for this purpose.
See the
list
of datasets with Make A Graph at this ERDDAP installation.