Layer properties and data sources
|Click the Info icon to adjust the transparency of a layer in order to see other layers or the base map beneath it.|
Data sources for layers
Frequency of data layer updates
Much of PDC’s data is updated automatically, in real-time, as soon as information is released by an authoritative agency. This includes the majority of PDC’s hazard layers, as well as its observational and forecast layers.
Other types of data in the system are updated by PDC manually as soon as information is made available. See Appendix A for a comprehensive list of hazards and their corresponding frequency of updates. See also how to manually refresh the Hazard list with the latest updates.
|Click the zoom icon to the right of the layer name (shown below) if you are having trouble viewing the layer you’ve selected. The map will zoom and re-center to bring the information into view.|
Note: Some layers require the map to be zoomed to a minimum extent or to a specific location in order to display the information.
Explore a data layer details
Data layers may be displayed and combined to quickly produce a meaningful map. You may also click on a layer’s map points and features to view associated data.
In the feature’s pop-up on the map you can access a summary of key information. To access even more details, select the Info button on the pop-up.
View hazard-specific layers
Click a hazard on the map to launch the Hazard tooltip. From the tooltip, click the Layers button to access key layers specific to that hazard type. You can turn these layers on to help you better understand potential impacts.
|You may also access these key, hazard-specific layers by clicking the Hazards icon on the left toolbar, selecting a hazard, and then clicking on the Layers tab.|
To learn more about the specific layers that are available for all hazards, click the Layers icon on the left toolbar. Under the Main folder, choose the subfolder to explore even more layers for each hazard type.
Layers to support major disaster response events
During major disaster events with widespread impacts to people’s lives and livelihoods, PDC will often integrate geospatial data layers into its platform to support situational awareness. Generally, these layers are for major events that require substantial support from PDC and the global response community. Learn more about past major response events under the section Historical Hazard Layers.