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Displaying basic maps with the GMap module

From: Drupal 6: Online Presentation of Data

Video: Displaying basic maps with the GMap module

In a previous video, we showed how to convert street addresses, such as, one main street into latitude and longitude components. Now comes the fun part, actually, mapping those points. First, we'll set up the GMap module so it has the dimensions and behaviors we want. Then we'll tell it we want all locations of households to appear in that map. I've taken the liberty of filling up all the houses so to speak, by connecting the other households with people. You might want to do the same by adding some nodes of the content type Household or you could import this course's exercise file.

Displaying basic maps with the GMap module

In a previous video, we showed how to convert street addresses, such as, one main street into latitude and longitude components. Now comes the fun part, actually, mapping those points. First, we'll set up the GMap module so it has the dimensions and behaviors we want. Then we'll tell it we want all locations of households to appear in that map. I've taken the liberty of filling up all the houses so to speak, by connecting the other households with people. You might want to do the same by adding some nodes of the content type Household or you could import this course's exercise file.

We've already downloaded the GMap module from Drupal.org/Project/GMap and we've installed it. To turn it on, go to Administer > Site building, and Modules. Then scroll down to the Location group. You'll notice a few extra modules here. There are four at the top. We'll only turn on GMap and GMap Location. GMap Macro Builder allows you to create text strings that specify how the map is going to appear. The GMap Taxonomy Markers module lets you show maps that only have nodes in them with a specific taxonomy term. For example, you could set up a map that only showed friends or pets. But we'll just leave those alone and go to the bottom and click Save configuration.

Now, we have to go back and actually enter some information we already entered again. Now, I'll show you another way to find administrative pages. First, we go to Administer and then click on By module. Once there, I'm going to search for location. So I hit Command+F on the Mac or Ctrl+F on the PC and search Location. Hit Command+G or Ctrl+G to go to the next one. Eventually you'll find it. Then I'm going to go to the Location configuration. From there, I go to Geocoding and scroll all the way down to United States. You might remember that that's the only one that we turned on, since we're only going to have people in the United States. Once you're down there, click on Configure parameters. That has your Google Maps API key. Click in that area and select all, on Mac that's Command+A, on the PC it's Ctrl+A, and copy it.

Now, I'll go back to Administer > By module, and then hit Command+F or Ctrl+F and find GMap. I'll just close out that little Find box at the bottom. Scroll down a little bit more and start configuring your GMap. Here, you'll enter your API key again, by simply pasting what you just copied, and then scroll to the bottom before you make any other settings. We'll go through several of these settings, but not all of them. Click on Save configuration. Now you can start to see a map here in this Preview area. In the GMap configuration page, there are a lot of settings, way more than we could discuss here. However, I do want to discuss three changes that I generally always find myself making.

The first is to increase the size of this map. It starts out quite small, as you can see, 300 pixels x 200 pixels. I'm going to change that to 600 x 600. Then if I scroll to the bottom, and click on Save configuration, we immediately see the change. That's a much better sized map. Scrolling down further, we see that we can set where it's centered by default, the default zoom level and so forth. If we're doing some advanced mapping with strokes, we can set Line default style. If we're showing areas, Polygon default style, that would be to indicate the area that you're showing, and you can change the size of some of the controls and how they appear.

Scrolling down further, you can also decide whether your users will first see the standard street map or a satellite image or one of those other things. I'll leave it on the default. You can also take away some of those capabilities from your users, so they're not allowed to see the satellite version. Again, I'm going to leave it as it is. But there is one change that I want to make down here in Map Behavior flags. That's auto-zoom. You'll see why when we're done. The last change that I'm going to make on this page is down at the bottom with Marker action. When you click on a marker on the map, I want it to actually open an Info window, and show the information that we're going to put in there.

We'll scroll to the bottom and click Save. I know we skipped over a lot there. If you'd like more help with the settings on that page, go to the GMap Project page or just go to Drupal.org and search for GMap. So there is the basic GMap settings. We've also turned on another module called GMap Location, which ties in data you entered via the Location module with Google Maps displays. Now we'll take a look at all the locations that are contained within that Household content type. But first, we'll configure GMap location. To do that, go to Administer > Site configuration and GMap Location.

The options on this page are divided into three sections. The first is this map/user. If you have a multi-user site and you have people entering locations of where they are in their user profile, you can actually create a map of all your users. We're not going to do that, so we'll scroll to the next section. This is the part that is interesting to us. The Node Map at map/node. We'll leave the Macro as it is. Again, you could change this and that will change the default setting when people first go to the map. You could change the header and the footer; we'll leave it as it is.

Scroll down a little bit further, and now we get to the third section. What kind of marker do we want for each content type? Well, as it turns out, only one content type has been location- enabled and you can tell that because the others have this text underneath that says that they're not. You might remember we had locations in our household. I'm just going to change this Marker type so it looks a little bit better. We'll change it to the little Purple marker. The Drupal marker is that little Drupalicon head that you'd see up here in the corner. It's cute, but it's not really what we're looking for.

I'm going to go down and click Save configuration. Now let's see what that map looks like. I'll click here and remove everything after our domain. Go to map/node and there it is, a map of all of the nodes that have location information. In our case, that's all of the households. If we click on any of them, we get a little bit more information, specifically, which you remember was the street address followed by the city and the location information along with this custom field that we have, the residence of that location. It is, in fact, the easiest way of adding an interactive map to your site.

Because Location and GMap are integrated with Views, you can do much, much more. We'll show you how to do that in the video about integrating GMap with Views.

Show transcript

This video is part of

Image for Drupal 6: Online Presentation of Data
Drupal 6: Online Presentation of Data

50 video lessons · 11272 viewers

Tom Geller
Author

 
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  1. 12m 56s
    1. Welcome
      1m 12s
    2. Reviewing requirements
      3m 35s
    3. Using the exercise files
      3m 11s
    4. Touring examples of data visualization
      4m 58s
  2. 27m 56s
    1. Planning data structure
      8m 26s
    2. Importing and manipulating data
      6m 40s
    3. Looking at Drupal's database
      6m 13s
    4. Deciding whether to store personal data as nodes or users
      6m 37s
  3. 1h 13m
    1. Understanding the Content Construction Kit (CCK)
      4m 57s
    2. Creating new content types with CCK
      7m 26s
    3. Hiding the Body field
      2m 46s
    4. Reflecting CCK field data in the Title field
      7m 28s
    5. Managing CCK field placement
      7m 34s
    6. Exploring CCK's other features
      8m 22s
    7. Using other CCK field types
      3m 25s
    8. Adding date information as a CCK field
      8m 43s
    9. Including images as CCK fields
      10m 23s
    10. Connecting content to existing nodes
      5m 58s
    11. Using taxonomies to categorize and group data
      5m 59s
  4. 53m 54s
    1. Understanding why views are useful
      6m 12s
    2. Using SimpleViews to create basic content views
      5m 49s
    3. Diving into the Views interface
      11m 16s
    4. Adding fields to a view
      7m 12s
    5. Understanding iconic controls in the Views interface
      7m 15s
    6. Surveying the Sort, Filter, and Field options in Views
      5m 40s
    7. Adding view displays as pages, blocks, and RSS feeds
      10m 30s
  5. 43m 34s
    1. Overriding default settings on view displays
      8m 56s
    2. Attaching more information to views
      10m 57s
    3. Improving view appearances with grid, list, and table formatting
      9m 20s
    4. Surveying other basic display settings in Views
      11m 3s
    5. Altering a view's appearance through CSS
      3m 18s
  6. 55m 8s
    1. Importing, exporting, and cloning views
      6m 9s
    2. Controlling access to views
      7m 19s
    3. Learning from built-in views
      5m 52s
    4. Creating views that aren't based on nodes
      10m 6s
    5. Extending views with arguments
      10m 17s
    6. Extending views with relationships
      7m 2s
    7. Going further with relationships
      8m 23s
  7. 46m 40s
    1. Understanding geographic data
      4m 26s
    2. Setting up the Location module
      16m 20s
    3. Entering geographic data with the Location module
      10m 10s
    4. Displaying basic maps with the GMap module
      6m 43s
    5. Integrating the GMap module with Views
      9m 1s
  8. 54m 21s
    1. Exporting data in tabular form
      11m 25s
    2. Planning with the calendar modules
      11m 31s
    3. Using the Charts module and Google Charts
      7m 11s
    4. Graphing data with Open Flash Chart
      4m 50s
    5. Making important data pop out with tag clouds
      7m 46s
    6. Putting it all together in an attractive package
      11m 38s
  9. 36s
    1. Conclusion
      36s

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