This is the second post in a three-part series on working with temporal data in ArcGIS.
In the previous post, we covered how to add data to ArcGIS Pro, prepare it for your project needs, time-enable the layer, then share the layer as a time-enabled web layer to an ArcGIS Online organizational site.
This post takes you through the steps to create a web map featuring the time-enabled web layer. The third post shows how to create a story map that features the web map.
Ready? Let’s get started.*
On the map, only the points from a specific time span are displaying.
Configure Pop-Ups
When making a web map, you need to decide what information users should see when they click a feature on the map.
Currently, all layer attributes display in the pop-up. Some field names are cryptic or irrelevant to the general audience this map is intended for.
You can configure the pop-up to*be more user-friendly.
Rethink Layer Styling
On the map, all the incidents are represented with the same symbol. This makes incident distribution easy to see, but suppose you want to communicate more about the piracy victims.
For example, were certain types of vessels targeted more frequently? Were some vessels victimized more frequently in specific years or was the “victim type frequency” consistent throughout the six-year span of the data?
To answer these questions, your first step is to symbolize the incidents based on the Victim attribute. The*ArcGIS Online smart mapping feature makes this easy.
The map will be easier to interpret if you categorize similar vessel types using one term.*One way to accomplish this is to edit the layer’s attribute values.
Standardize Attribute Values
Victim values could have been edited in ArcGIS Pro before the shapefile was shared as a web layer. However, it’s usually wise to keep source data as-is and make a project copy. Most organizations have standard procedures governing how GIS data is edited. Because this web layer was shared to My Content, editing the attribute values won’t affect anyone else’s work.
Now that you’ve standardized the victim values, you can symbolize the layer using unique symbols.
There are three remaining victim types that don’t fit into the standard categories. You can move them into the Other class by selecting their row, then dragging the row down below Other.
Related training:
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In the previous post, we covered how to add data to ArcGIS Pro, prepare it for your project needs, time-enable the layer, then share the layer as a time-enabled web layer to an ArcGIS Online organizational site.
This post takes you through the steps to create a web map featuring the time-enabled web layer. The third post shows how to create a story map that features the web map.
Ready? Let’s get started.*
- Go to www.arcgis.com and sign in to your ArcGIS Online organizational account.
- In My Content, right-click the web layer and add it to a new map.
On the map, only the points from a specific time span are displaying.
- In the Contents pane, click the ellipsis button under the layer’s name, then click Disable Time Animation. All the layer’s points now display on the map.
Configure Pop-Ups
When making a web map, you need to decide what information users should see when they click a feature on the map.
Currently, all layer attributes display in the pop-up. Some field names are cryptic or irrelevant to the general audience this map is intended for.
You can configure the pop-up to*be more user-friendly.
- In the Contents pane, click the ellipsis button under the layer name, then click Configure Pop-up.
- In the Pop-up title box, delete the existing content, then click the plus sign to see the fields list. Click {DateOfOcc}.*
- In the Pop-up title box, delete the existing content, then click the plus sign to see the fields list. Click {DateOfOcc}.*
- Under Pop-up Contents, click the down arrow next to Display and choose “A custom attribute display.” Click Configure.
- In the Custom Attribute Display dialog box, click the plus sign and add the {Victim}, {Desc1}, {Desc2}, {Desc3},*{Desc4}, and {Desc5}*fields. Add a space between each field.
- Select {Victim} and click the bold button. Add an extra paragraph return after the {Victim} field.
- Click OK, then Save Pop-up.
Rethink Layer Styling
On the map, all the incidents are represented with the same symbol. This makes incident distribution easy to see, but suppose you want to communicate more about the piracy victims.
For example, were certain types of vessels targeted more frequently? Were some vessels victimized more frequently in specific years or was the “victim type frequency” consistent throughout the six-year span of the data?
To answer these questions, your first step is to symbolize the incidents based on the Victim attribute. The*ArcGIS Online smart mapping feature makes this easy.
- In the Contents pane, click the Change Style button under the layer name.
- Choose to show (symbolize by) the Victim attribute. The suggested drawing style is Unique symbols. This is what you want. Click Options.
The map will be easier to interpret if you categorize similar vessel types using one term.*One way to accomplish this is to edit the layer’s attribute values.
Standardize Attribute Values
Victim values could have been edited in ArcGIS Pro before the shapefile was shared as a web layer. However, it’s usually wise to keep source data as-is and make a project copy. Most organizations have standard procedures governing how GIS data is edited. Because this web layer was shared to My Content, editing the attribute values won’t affect anyone else’s work.
- Cancel out of the Change Style pane. In the Contents pane, click the Filter button under the layer name.
- In the Filter dialog box, click the Edit tab, build the expression “Victim contains Tanker,” then click Apply Filter.
- In the Contents pane, click the Show Table button. Only records that meet the filter expression criterion are shown in the table, and they are selected.*
- Mouse over the Victim field name, click the gear icon, then click Calculate.
- In the expression box, enter ‘Tanker’ (in ArcGIS Online, text values are enclosed in single quotes). The expression reads Victim = ‘Tanker’.
- Click the Validate checkmark button to make sure your expression is valid, then click Calculate. Note: There’s no undo on table edits.
- Click the down arrow next to Table Options, then clear the selection.
- In the Contents pane, click the Filter button, then click Remove Filter.
- For more information about working with tables in ArcGIS Online, see this help topic.*
Now that you’ve standardized the victim values, you can symbolize the layer using unique symbols.
- In the Contents pane under the layer name, click the Change Style button.
- In the Change Style panel, choose the Victim attribute, choose to style by unique symbols, and click Options.
There are three remaining victim types that don’t fit into the standard categories. You can move them into the Other class by selecting their row, then dragging the row down below Other.
- Click OK, then Done.
- Click the ellipsis next to the layer name in the Contents pane and choose Enable time animation.
- Play the time animation. You can use the forward and back buttons to manually progress through individual time spans, or play the full time animation automatically.
- Click the wrench icon next to the time slider, then click “Show advanced options.”
- In the Contents pane, rename the layer to*Piracy Victims.
- The web map pop-ups, symbology, and time settings are now configured, so save the map.
Related training:
- Would you like to learn more about working with the ArcGIS Online map viewer? Check out*these training options.
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