

Golden Gate National Recreation Area - Park Atlas
This page describes what a Park Atlas is, how to access it, how to navigate the interface, and some common ways to use the app.
What is the Park Atlas?
- Assembles park, national, neighboring lands data in a single easy to use interactive map
- Includes GOGA, MUWO and FOPO data
- Layers include but are not limited to: trails, fire history, vegetation, utility poles, culverts, cultural landscapes, signs, wetlands and high-resolution imagery.
- Can be used to help support park operations and a broad spectrum of projects
- Provides GIS users and non-GIS users alike who need spatial information a place to go to answer questions relatively easily and quickly
- Can be used to create static maps with existing layers
- Data is up to date and from many sources not just NPS based
- The current GOGA Park Atlas is a BETA version
- The atlas is being updated on an ongoing basis as we make improvements to park level datasets
Where is the Park Atlas?
It can also be found on the GOGA GIS SharePoint page
How to access the Park Atlas
- Park Atlas is hosted on ArcGIS Online (AGOL)
- To get access to AGOL, staff must request a via the form linked below:
- Once an account has been created for you, follow instructions provided by the regional GIS coordinator
Interface Navigation
Splash Screen
- When you open the atlas you will see a splash screen describing the atlas
- Click on any part of the greyed out screen to close it
Panels
The atlas consists of two panels:
- The Map Panel
- The Side Panel
Map Panel Controls
- Zoom
- Default View
- Search
- Basemap
- Measure
- Full Screen
- Open Layer Table
Map Panel Widgets
- Bookmarks - allow users to zoom to a pre-defined park management unit
- Print - allows printing of maps users make
- Draw - draw points, lines and polygons on the map
- Add Data - allows adding additional data to the map
- Note: This is an advanced feature that will be covered in another training
Side Panel
Two Sections:
- Legend - displays only layers that are turned on in the map
- Layer List - categorically grouped data
By default, only visitor centers and actively managed boundary layers are turned on
Side Panel - Layer List
- Expand group layers - click the arrow icon to expand layers in a group
- Layer visibility - click the eye icon to turn on group layer visibility and click it again on any layers in a group you want to display
Visibility Scaling - you should also notice that some layers in the list are greyed out. This is because the map is not zoomed in enough to display a specific layer or layers
Zooming in and out on the map with group layers expanded will allow you to explore which layers show at certain zoom scales
As a general rule, layers with more detail will only display at larger scales (more zoomed in)
Side Panel - Additional Layer Functionality
- Clicking the ellipsis on a group layer lets the user change the transparency level for all the layers in the group
- Clicking on the ellipsis on an individual layer expands it and shows six additional options
Side Panel - Individual Layer Options
- Zoom to - zooms to selected layer
- Increase Transparency - increases transparency of selected layer
- Decrease Transparency - decreases transparency of selected layer
- Details - links directly to feature layer or service summary and description page
- View in table - allows associated tabular data to be viewed in table format - requires selecting the open layer table button described on a previous slide
- Export - allows export to other formats (not available on all layers - export must be enabled on layer source for this feature to work)
Use Cases
Bookmarks / Visibility Scaling / Transparency / Pop-ups
Click on the Bookmark widget and select 'Oakwood Valley'
The map zooms into the bookmarked location and the location is highlighted in the bookmark list
If you expand the Transportation and Vegetation and Landcover group layers you will notice that many of the layers are no longer greyed out - the map has crossed the visibility scaling threshold for these layers to be displayed
Click the X on the bookmark widget to close it
With the Transportation and Vegetation and Landcover group layers expanded, turn them on and turn on the GOGA Trails and Marin Fine Scale Vegetation layers
Your map should look like the screen on the right:
To interactively learn more about the vegetation or trails click on a feature
A pop-up will appear with details about the selected feature(s)
If more than one feature is selected, you can use the arrows at the top of the pop-up window to click through all of them
If you want to see some details without clicking on a specific feature, you can zoom in another two levels to make labels for both trails and vegetation turn on automatically (visibility scaling is set for labeling of some features as well)
Boundary Questions
A common question the GIS team receives relates to boundaries and responsibility of the park. The Park Atlas can help staff answer many of these questions.
Set the map to the default view (click the home button on the upper left of the map panel) and turn-off the Transportation and Vegetation and Land Cover group layers.
On the upper right of the map panel click the Search button and enter the following address: 1 25th Ave N, San Francisco, CA, 94121, USA
Press Enter
The map automatically pans and zooms to the location entered in the search field
The user wants to know if an encampment on this parcel is the responsibility of the park, and needs to create a static map showing the result.
We can see that the park boundary is some distance from the address point but let's modify the map slightly to make it clearer.
To create a map that illustrates the situation, do the following:
- Under the Boundaries and Administration group layer turn on San Francisco Parcel layer.
- Under the Other Basemaps / Topography group layer, turn on San Francisco 6" Imagery - 2018 layer.
- Increase the transparency slightly so the assessor parcel number labels are legible on the image basemap
- The result should look like the map on the right
Next, use the Draw widget to draw a polygon around the parcel in question (be sure to select an outline symbol/color before drawing, you will have to erase and draw again if not)
Finally, use the Print widget to print the results of your work. The settings should be similar to those below and the example on the right:
- Title your map
- Template: 8.5X11_LANDSCAPE_LEGEND
- File Format: png32
- Expand the Advanced menu
- Current map extent
- Add your name in the Author field
- Include a legend
- Change the Scalebar unit to feet
- Print quality should be 300dpi
- Print the map
The result is a map with an NPS official banner like the one on the right
Advanced Functionality: Viewing Tables and Filtering
Looking at culvert data in a specific park location
Set the map to the default view (click the home button on the upper left of the map panel) and turn-off the San Francisco Parcel and San Francisco 6" Imagery - 2018 layers.
On the bottom center of the map panel click the Layer Table View button (note: it will be empty until we open a table associated a layer)
Turn on and expand the Facilities group layer and turn on the Culvert layer
Click the ellipsis next to the Culverts layer and select View in table
The culverts table is now populated with all the culverts mapped in the park
Now, let's refine the results, zoom to a location and look at the data in more detail.
With table open, select the Actions button on the top right of the table and choose Set Filter
Toggle the filter button on and click +Add button and choose Clause
Replace OBJECTID with Road Name
From the select source type dropdown, choose Unique
From the resulting list, select Old Bunker Rd (note: you can start typing the name and the list will refine results)
Click the Actions button again and notice the number nine in parentheses next to the all data selection and also that the set filter option has an orange dot next to it. These both indicate that there is an active filter and that the result is nine culverts.
The table now only shows the nine culverts along Old Bunker Rd
From the Actions button, select Zoom To
The map panel should now be zoomed into the filtered list of culverts along Old Bunker Rd. like the example on the right
Click on any one of the culvert points to open its pop-up
Click the dock button on the pop-up to move it to the right of the map panel and to enlarge it
Scroll through the pop-up to see the expansive list of attributes and images associated with the feature