Connecting to the San Juan data as a web
From ArcMap (tested in version 10 and
9.3.1), you can connect to this data as a WCS service.
This is similar to an SDE read-only connection.
From the catalog window of ArcMap, or from the AddData button follow
the steps below.
- Select GIS Servers and doubleclick on Add WCS Server
- For the URL, enter
and click OK
- Bring back the catalog window and you will see "San_Juan_LiDAR on
- Click on the plus sign and you will see the data layers.
- Drag a dataset onto your map to use it.
It will behave just as if you had
downloaded the entire filegeodatabase, except that metadata is sparse.
You will have to refer to the
Drag any layer onto your map to view it.
You will be able to view the data with little loss of performance
compared to local data.
If you wish to save locally, you can right right-click on any data
layer and click on "Data > Export Data...". You can download
the entire raster, clip to a drawn rectangle, or clip to the data view.
If you clip to the data view, snapping is not supported, so your result
can shift as much as half a cell. Snapping is ensured by cliping to a
drawn rectangle or by using a polygon feature layer and the "Extract by
Rectangle" tool under the Spatial Analyst Tools. To clip the data
using a drawn rectangle follow the steps below.
Clipping to a drawn
- In ArcMap, start in Data view (rather than Layout view).
- Invoke the drawing toolbar and draw your clipping rectangle.
- Edit the rectangle's object properties to make it snap. Change
the corner coordinate and the Width and Height of the rectangle to
multiples of three.
- Right-click on the raster dataset in the Table of Contents and
choose "Data>Export Data...". In the Export WCS Data window,
choose the "Selected Graphics" button.
- After you have chosen where to save the new dataset, click on the
This server is under development. Service may be sporadic, and
passwords may be instituted when we figure out how to do it.
We will have to curtail access if demand exceeds capacity.
Unlike most LiDAR DEMs, and unlike the supermosaic, this is three-foot