Selecting Map Features

Topics:

Single Map Selection

Accela GIS shows GIS features and transactional information found on any location you click on the map. While you are navigating and analyzing an area of interest on the map, you can click on a map location to select it and to see what is at that location.

The following example shows a selected map location:



The context menu shows the location’s address, x and y coordinates, and all the GIS objects found on that map location. The context menu uses the GIS legend symbols used on the map, and indicates how many GIS objects for each type were found. In this example, the user is interested in seeing the parcel information, and clicked the found Parcels line item.



After a GIS object layer has been selected (for example Parcels), the What’s Here menu shows the list of the GIS object IDs. If multiple GIS objects are found, for example if you clicked on a point that intersects several parcels, the What’s Here menu lists all the intersecting parcel IDs. Select the object ID to see the actions that can be applied on that GIS object.

The following example illustrates the Show GIS Information command from the Action Items menu, and the GIS information for the selected parcel:



 

Multiple Map Selections

You can select multiple map locations and see their GIS features and related transactional records. For multiple map selections, Accela GIS lists all selected GIS features and displays drill-down information and action commands on a slide-out panel.

 

Selecting Non-Contiguous Locations

Press and hold the Shift key while you click on multiple map locations. The following diagram shows three non-contiguous parcels that have been selected using the Shift key:



On the slide-out panel, hover the cursor on a line item to highlight the GIS object(s) on the map. Click a map layer to see the list of GIS object ID(s) and apply an action on selected object ID(s).

 

Using the Map Selection Tool

The map selection tool that allows users to select GIS objects across map layers by rectangle, polygon, or polyline:



Using the map selection tool, users can select GIS objects on the visible and selectable map layers by using one of the following selection tools :

  • Select by rectangle - Selects GIS objects inside and intersecting the rectangle.



     

  • Select by polygon - Selects GIS objects inside and intersecting the polygon.



     

  • Select by polyline- Selects GIS objects intersecting the polyline.



Multiple selection on visible and selectable map layers

A selection tool selects GIS objects on map layers that are visible and selectable. The visible and selectable map layer attributes are initially configured by the GIS administrator on the GIS Administration site, and can also be enabled or disabled by the user on the Layers widget.

The following Layers widget shows that the user has permissions to the sample Petaluma_Demo map profile containing the Parcels and Buildings map layers, which are marked as visible and selectable.



 

The GIS Objects panel

Once the user has finished selecting by rectangle, polygon, or polyline, the selected GIS objects across the selectable map layers are shown on the GIS Objects panel on the right:



From the GIS Objects panel, a user can:
  • See a list of map layers containing the selected GIS objects. The number of selected GIS objects (per map layer) is shown next to the map layer name.



     

  • Expand or collapse each map layer to show or hide its selected GIS object IDs.



     

  • Under a map layer, click individual GIS object IDs to deselect or re-select it.



     

  • Expand or collapse a GIS object ID to show or hide its properties on the panel.

     

  • Under a map layer, DESELECT ALL or SELECT ALL GIS object IDs.



     

  • Select more GIS objects on the map. The additional GIS objects are appended to their respective map layers on the GIS Objects panel.



     

  • Click the Action menu and perform a command using the selected GIS objects


    Note: The Buffer Select option on the Actions menu is only available if all selected GIS objects belong to one layer. If multiple GIS objects were selected from multiple layers, the Buffer Select action is not available.

     

  • CLEAR ALL selected GIS objects on the panel and on the map



     

  • Hide the panel.



     

Tips on using the map selection tool

  • A highlighted selection tool (), indicates that the map view is in selection mode. To exit the selection mode, click the selection tool to unhighlight it ().
  • If a user wants to choose another area to make a selection using the Select by rectangle tool, exit the selection mode, and pan the map to a different area.

  • A user can select up to 1000 GIS objects (from all layers). When the selection tool selects more than 1000 GIS objects, a message notifies the user to reduce the number of selected objects.

 

Distance Buffer Selection

Another way to select multiple locations on a map or query map features is to select a distance buffer. A distance buffer allows you to define an area around a selected point, line, or polygon feature so that all GIS objects located within the area are automatically selected. Distance buffer selection only applies to a single map layer.

For example, if you want to send a notification to the property owners that live within 300 feet of a certain parcel, click on that parcel and then define a distance buffer to automatically select all parcels within a 300 feet radius.

To select multiple GIS objects using a distance buffer

  1. Click a point on the map, and select either a found GIS object or the Use Location menu option. Your selected location acts as the center point of your distance buffer.

  2. On the next window, choose Buffer Select.



  3. On the Buffer Select window, enter your distance buffer selection:

    Map Service The default map service displays. If more than one map service is configured, you can choose another map service from the drop-down list.
    Map Layer The map layer containing the objects you want to include in the distance buffer.
    Distance The length around the point or map feature you clicked on. Enter the distance and unit of measure.

    The following diagram shows a sample parcel layer selection for a 300 ft distance buffer:



From the Buffer Selection panel on the right, you can select specific parcel(s), drill-down to get more details, or choose an action to perform.

 

Drive-Time Buffer Selection

A user can also query map features by defining a drive-time buffer which is an area that can be reached within a specified number of minutes. Drive-time buffer selection only applies to a single map layer.

To select multiple GIS objects using a distance buffer

  1. Click a point on the map, and select either a found GIS object or the Use Location menu option. Your selected location acts as the starting point of your drive-time buffer.

  2. On the next window, choose Drive-Time Buffer Select.



  3. On the Drive-Time Buffer Select window, enter your drive-time buffer selection:

    Map Service The default map service displays. If more than one map service is configured, you can choose another map service from the drop-down list.
    Map Layer The map layer containing the objects you want to include in the distance buffer.
    Distance The number of driving minutes from the point or map feature you clicked on. The driving time is calculated by the map service based on speed limit and street network.

    The following diagram shows a sample parcel layer selection for a 300 ft distance buffer:



From the Buffer Selection panel on the left, you can select specific parcel(s), drill-down to get more details, or choose an action to perform.