When working with large maps with lots of data added to them, it quickly becomes necessary to organize your map objects and change attributes of many objects at once. Here we will look at strategies available to help you manage your map data.
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Folders are the primary organizing tool in CalTopo. When you add objects to the map, they initially appear in one of two folders: Markers, or Lines and Polygons. To add a new folder, use any of the Add Object menus and select Folder. Enter a title for the folder. In CalTopo, the box for loading on the map load is automatically checked. Leave it that way for now, and press OK to create the new folder. This folder will show up in the left hand side bar and will not have any objects inside it yet.
Here is an image of markers and lines and polygons organized in their native folders.
To move objects to a folder, you can edit objects individually or use Bulk Ops. While the initial Marker folder or Lines and Polygons folder only contain the type of object that is in the title, custom folders that you create can hold both markers and lines or polygons in the same folder. Open an existing object and look for the drop down “folder” menu. Your new folder is listed there. Select the new folder to move the item to, then hit OK to save the object. Now the object is listed in the new folder and no longer in its original folder. You can see the Lakes folder now displays in the folder drop down menu in the edit box for this object.
In this example, we want to move the campsite from the Lines and Polygons folder it was created into a new folder that I made called Lakes. We select Lakes from the folder menu in the object edit box, then hit OK and the object changes folders.
To move a lot of objects between folders at once, use Bulk Ops, covered below.
Folder visibility can refer to the objects on the map or the list of map objects in the folder. You can collapse the folder and hide its contents in the map objects sidebar by clicking on the name of the folder. Repeating this for multiple folders will make it easier to see your folders list without all of the objects listed within the folders.
To change whether all the objects in a folder are displayed in the mapviewer, use the check box next to the folder title. This will quickly hide or unhide all the objects within that folder on the map.
You can create two defaults for your folder for when you open the map:
In the mobile app, you create folder the same way as in the web program. Go to the objects menu, click the + Add Item button at the bottom of the screen, and choose Folder. Name your folder, then tap save.
You can now save objects to this folder, or move them to the folder one at a time by editing the object and changing the folder selection for that object. You can tap the pencil icon next to the folder to set the visibility when you open the map and set label visibility.
Bulk Operations (Bulk Ops) allows you to quickly change the attributes of many objects with one step instead of opening the edit dialogue for each object.
Locate the Bulk Ops link at the bottom of any folder containing items. It will open a box like this, containing a list of all the objects in that folder. You may have to scroll through the list if there are a lot of items. Select any combination of items or all items from the list before selecting what type of change to apply to those items.
Below are a few examples in order to show how Bulk Ops works and what you can do with it.
In this image, we’ve selected all of the polygons. Clicking on “Change Attributes” opens the next screen.
We’ve selected the drop down menu for folders, and then selected Lakes. Upon update, the items all move to the folder called “Lakes” as seen in the next image. Their color and fill will also reflect the changes made.
Create a new folder for Route Segments In Bulk Ops, move lines to new folder “Route Segment” In Bulk Ops, change every other line to be a different color, so that line colors alternate. Make lines thicker but more transparent.
Create new folder from objects menu:
Move lines from “Lines and Polygons” to “Route Segments”
Maybe we start with a list of markers that indicate potential campsite locations. We’d like to move those to a campsites folder and make the icons appear as a tent for all of them.
Bulk Ops contains other functions in addition to changing the object attributes. These functions allow for comparative analysis, or bulk actions such as printing and deleting.
Some users may wish to print smaller-scale, individual maps of certain objects, such as a segment for a hike for each day. The controls for this are much simpler than the options from the regular print dialogue, as your only choice is a minimum scale. Select the objects to print individual maps of, click the link for “Print Individual Maps” and wait a moment for the PDFs to load. The maps will be in one document, but will have a single page for each object.
Here are examples for two of the lake polygons we’ve been looking at. The orientation of the print is automatic depending on the relative shape of the polygon object.
To view and compare line profiles, use the absolute or relative profile links. First select the objects to compare (all are selected here), then click one of the profile links. It will calculate the profiles and produce a graph.
While at first glance the two types of profiles look very alike, the key difference is reflected in the starting “elevation.” The first chart, the Absolute Profile, arranges the lines according to their actual starting elevation.
The second chart, Relative Profile, compares the relative elevation changes per line. They each begin at a zero vertical point, and are drawn relative to each other at that zero point. Thus, comparing segments A and B, A begins at an absolute elevation of about 1,410 ft and B begins at about 1,380 ft. On the other hand, comparing the relative elevations over time, we see that by 2.5 miles in, B has climbed some hundred feet while A has generally stayed flat or lost elevation. While you could still determine this information from the Absolute graph, the relative graph can depict difference more clearly.
To remove multiple objects at once from a map, use the bulk ops delete function. Open bulk ops, select all of the objects you choose to delete, click Delete, and then confirm you want to delete those objects. There is no recovery of deleted items, so use caution with this feature.