The N-Sink tool is built using the ArcGIS API for Adobe Flex. In order to use the tool, your browser must have the Adobe Flash Player 10 or above installed. See http://www.adobe.com/products/flashplayer for more information about how to download Adobe’s latest Flash Player free of charge.
There are four different basemap options: Topographic, States, Imagery, and Neutral Gray. Click on the button to switch between base maps.
If the Data Layers box is not open, click on the Data Layers Widget to show the Data Layer list.
A layer can be turned on or off by checking the box next to the layer name. If the layer is part of a layer group, the group name must also be checked (see Layer Groups section below).
For example, Flow Direction is the Group and must be on for either the 1000m Cell Size layer or the 500m Cell Size layer to draw. Here, the 100-m Cell Size layer is checked (visible on the map) and the 500m Cell Size layer is unchecked (not visible on the map).
Next to each layer in the Data Layers list is a down arrow (orange circle here). Click on the down arrow to see options to:
Zoom To changes the map extent to that of the lower (in this case, Flow Lines).
Move Up and Move Down changes the order of the layers. Layers draw in the order they are listed so a layer on top can hide layers underneath it.
The Description takes you to what is called the REST endpoint. It is a technical GIS page with all the information about the map service.
Transparency: slide the bar from opaque (soild) to transparent (see-through). This is mighty handy when layers overlap and you want to see through one.
The Legend widget displays the colors and symbols for all map layers that are actively being displayed or checked on. Open the Legend by clicking on the button (shown left). You may need to scroll in the legend to see all the layers.
|Lakes and Ponds, Percent Removal|
|Rivers and Streams, Percent Removal|
|Pour Point Location||USGS NHD|
|Flow Direction||USGS NHD|
|- 1000m Cell Size|
|- 500m Cell Size|
|- 250m Cell Size|
|- 100m Cell Size|
|- HUC12 Boundaries|
|Hydrography, NHD Plus|
|Flow Lines||USGS NHD|
|Hydric Soils, SSURGO||Natural Resource Conservation Service|
|Stream Reaches||USGS NHD|
|NLCD 2006||National Land Cover Dataset|
|Elevation||USGS National Elevation Dataset (NED)|
|Hillshade||USGS National Elevation Dataset (NED)|