Layers Tab

The maps consist of a number of layers A group of the same type of features that you can view on a map, such as parcels, water mains or street names. The data for each layer resides in a database table, where each individual feature of the layer is represented by a row, and the data connected with the feature (i.e. house number, APN, etc.) is stored in fields (columns) in the table., one for each group of features. For example the Parcels layer shows all the Parcels on the map. Each instance of a parcel is a feature A piece of information that can be displayed on the map such as a parcel number,fire hydrant, or aerial photograph. Each individual feature is represented by a row in a query table. (See "table") with accompanying attributes A particular item of data about a feature, which are stored in tables, which you can view using the Identify tool .  

All layers that are available for your service A set of map data. are displayed on the Layers Tab  to the right of the main window. Each service has a different set of layers, organized for the needs of the particular service. Many have the main categories shown, in particular:

• Parcels

• Landbase

• Water Features

Activating and Deactivating Layers

When you activate a layer A group of features that you can view on a map, such as parcels, water mains and street names., the corresponding features are displayed in the main window. If you deactivate a layer, the features are hidden from view.

To activate or deactivate layers, click the check box next to the layer name. To activate or deactivate an entire group of layers, click the check box next to the group name. In the example, the following layers are activated:

• All of the Parcel layers

• Only the City Boundary of the Landbase layers

Layer Info

• Scroll to the bottom of the Layers pane to read the key to colors and symbols in the Layers tab.

• Layers with symbols are connected to external data or reports.

• Layers in red are the only ones visible at all Scale levels. To see the others, you have to Zoom in closer.

Aerial Photos Layer

Aerial photos can provide a useful view of an area, but because of their large size, they add to the loading time when you are navigating the map. For that reason, keep them turned off until you locate the area and zoom you want to see on the aerial. Since they are the lowest layer, if you have parcels turned on, you cannot see the aerials.