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ERDDAP > wms > erdMBchlamday

Dataset Title:	Chlorophyll-a, Aqua MODIS, NPP, Pacific Ocean, EXPERIMENTAL (Monthly Composite)
Dataset ID:	erdMBchlamday
Institution:	NOAA CoastWatch, West Coast Node
Information:	Summary | Variables | Background | Data Access Form | Make A Graph

This web page is using OpenLayers to display maps which are created on-the-fly by ERDDAP's Web Map Server (WMS) version 1.3.0. The controls on the left of the map are for navigation. The control on the right manages the layers. You can select different values for the data variable's dimension(s):
time:	2008-01-16T12:00:00Z 2008-02-15T12:00:00Z 2008-04-16T00:00:00Z 2008-05-16T12:00:00Z 2008-07-16T12:00:00Z 2008-08-16T12:00:00Z 2008-09-16T00:00:00Z 2008-10-16T12:00:00Z 2008-11-16T00:00:00Z 2008-12-16T12:00:00Z 2009-01-16T12:00:00Z 2009-02-15T00:00:00Z 2009-03-16T12:00:00Z 2009-04-16T00:00:00Z 2009-05-16T12:00:00Z 2009-06-16T00:00:00Z 2009-07-16T12:00:00Z 2009-08-16T12:00:00Z 2009-09-16T00:00:00Z 2009-10-16T12:00:00Z
altitude:	0.0

What is WMS?

Three Ways to Make Maps with WMS

1. In theory, anyone can download, install, and use WMS client software.
   Some clients are: ArcGIS, Refractions PHP WMS Client, 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
       http://coastwatch.pfeg.noaa.gov/erddap/wms/erdMBchlamday/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 Make A Graph 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.
    

2. Web page authors can embed a WMS client in a web page.
   For the map above, ERDDAP is using OpenLayers, which is a very versatile WMS client.
   OpenLayers 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.)
    
3. A person with a browser or a computer program can generate special GetMap URLs and view/use the resulting image file.
   Opaque example: http://coastwatch.pfeg.noaa.gov/erddap/wms/erdBAssta5day/request?service=WMS&version=1.3.0&request=GetMap&bbox=0,-75,360,75&crs=EPSG:4326&width=360&height=150&bgcolor=0x808080&layers=Land,erdBAssta5day:sst,Coastlines,Nations&styles=&format=image/png
   Transparent example: http://coastwatch.pfeg.noaa.gov/erddap/wms/erdBAssta5day/request?service=WMS&version=1.3.0&request=GetMap&bbox=0,-75,360,75&crs=EPSG:4326&width=360&height=150&bgcolor=0x808080&layers=erdBAssta5day:sst&styles=&format=image/png&transparent=TRUE
   See the list of datasets available via WMS at this ERDDAP installation.
   For more information, see ERDDAP's WMS Documentation .

   In practice, it is probably easier and more versatile to use this dataset's Make A Graph form
   than to use WMS for this purpose.
   See the list of datasets with Make A Graph at this ERDDAP installation.