Usage Hints for site locator maps
from Google Maps

These usage hints apply to locator maps reached by clicking a "Google™" link on a site data page on this Website.

Our customization:  We present a Webpage containing a Google Map centered on the latitude and longitude of the place being located, as best we know it.  Above the map pane is identification of the place, matching the site data page.  At the center of the map pane is a "map tack" icon which not only pinpoints (or approximates) that location but also provides additional information when clicked.  The initial zoom level of that map gives you the closest practical view of the site and its surroundings consistent with both our knowledge of the location and the currently available overhead photography.  Additional controls and brief help text appear in the side panel of the display.  The various aspects of this customization are explained in more detail below.

NOTE:  In some cases, Google's map data is not correctly aligned with their overhead photography.  When we can see this, we will set the icon location to match the photography rather than the map, even though it's possible that the error lies in the photogrammetry rather than in the cartography.

Need help?  Want advice?  Pick a question . . .

• What's "Google Maps" ?
• Why are these usage hints important?
• How can I get a different view of the site surroundings?
• Why might I want a different view of the site surroundings?
• What other map controls are available?
• The locator marker (icon) on the map is in the wrong place; how can I help fix it for future visitors?
• I tinkered with the map controls too much, and now I'm lost.  How do I get back to the original version?
• Why isn't the map embedded directly in the site data page?
• Is there an easy way to get driving directions to/from the site?

Have a question that's not listed above? or just curious?  Read all the answers in order . . .

If you don't find what you need, use the email link at the bottom of the page to ask your question.

What's "Google Maps" ?

Google Maps is an online dynamic mapping service which is provided at no cost to the Guild by Google.com, an independent company.  It offers several different services for location-based information for most of the world; we utilize road maps combined with overhead photography.  Initially we used this only for North America, testing its evolving capabilities.  However, beginning in May 2006 we are using it for all parts of the world, anticipating that the present coverage will improve as time goes on. 

Google's road maps and overhead photography can be viewed independently or in a coordinated overlay.  The level of detail available varies widely throughout the world.  For example, in many parts of the USA, much more detail is available for street maps than for overhead photography; but in foreign countries the reverse is frequently true.  From time to time, Google acquires improved street map data for various countries or improved overhead photography for various areas.  We do not attempt to monitor such improvements; but when we happen to find them in the course of maintaining a site data page, we will update the locator map link appropriately.

Why are these usage hints important?

The Google Maps service is aimed at the general user, and doesn't provide any online help because it expects that all aspects of its maps and controls are intuitive.  Since we have added features through our own customization of Google Maps, we supply both generic help for Google and specific help for those added features.  (We will welcome suggestions for further improvements; please use the email link at the bottom of this page.)

This page which you are now reading explains what you might not find intuitive, and also explains how we use that service.  It emphasizes what controls are especially useful in this context, and warns about what you should not do while viewing a locator map which we have customized. 

A significant limitation of Google Maps is that it only works on certain Web browsers (though those are the most widely used).  If you have been unsuccessful at getting our Google maps to work for you, click here for a new window onto Google's own home page for maps.  If your browser isn't supported by Google, it will tell you so.  However, if your browser is supported by Google, but our map doesn't display properly for you, then please tell us about it.

How can I get a different view of the site surroundings?

Google Maps has only a few options to customize the map to meet your particular needs.

• The most important Google Maps control is the vertical zoom slider, which enables you to zoom in and out (i.e., see a nearer or more distant view).  It's located just below the upper left corner of the map, and looks like a little piece of railroad track.  Each tick on the line represents a map scale; the position of the slider indicates where the current map falls in the range of possible scales.  Click on the "+" button at the top end of the line or on any tick above the slider to get a map which covers a smaller area in more detail; click on the "-" button at the bottom end of the line or on any tick below the slider to see a larger area in less detail.  Regardless of which zoom level you choose, the resulting map will be exactly the same size on your screen.
  The zoom control is important because we set different sites to start at different zoom levels when you first display the site locator map.  To see the reason for this, read the answer to the next question below.  You can change that zoom level to meet your needs; but unless Google has improved their overhead photography coverage since we last checked this map link, zooming in closer is unlikely to be helpful.  (There are two exceptions.  Firstly, if we don't know the location precisely, we'll leave the zoom level farther out than it otherwise could be.  If you can help to improve the location, please do so.  Secondly, if Google's map data are more detailed than their photo data, we'll leave the zoom level at the best photo detail, which will probably look quite fuzzy.  You may be able to switch to Map view (see below) and zoom in further.)
  Special Note (Oct.2007):   The maximum zoom level which can be pre-set is currently 19, and that is also the apparent maximum level on the zoom slider when a Google Map is first displayed.  However, higher zoom levels are available in a few areas of the world, and can be reached by clicking the "+" box at the top of the zoom slider.  When we find this to be the case, a message will appear in red just above the map pane.  (Using the Reset button in this case will not return to level 19.)
• Click any one of the pan controls (the four arrow blocks in the upper left corner of the map) to see more of the local area in the desired direction (and less in the opposite direction).  The red marker for the site location will still be visible on the resulting map unless you click twice in the same direction.  Or click-and-drag anywhere on the map to pan (move the image) smoothly in any direction. 
• If you pan so far that the red marker disappears off the edge of the map, you can get it back by clicking on the box in the center of the four arrow blocks in the upper left corner of the map.
• In the top right corner of the map are three buttons reading Map, Satellite and Hybrid.  Initially the display will be in Hybrid mode, viewing an aerial photomosaic with a semi-transparent street map overlaid on it.  Click the Map button to see just an abstract street map at the same scale.  Click the Satellite button to see just the the aerial photomosaic without the map overlay.

Our customizations do not alter any of Google's options.  But we do provide a Reset button (see below) to help you recover from any unwanted changes that you might inadvertently make.

Why might I want a different view of the site surroundings?

The amount of detail which Google Maps provides varies in different parts of the world, and even in different parts of a single country (especially the USA).  So if you zoom in to the closest theoretically possible level, you might be unpleasantly surprised to get, not a map or an aerial view, but the message, "We are sorry, but we don't have imagery/maps at this zoom level for this region."

To save you that disappointment, we have pre-set the locator map for each site at the closest practical level available in Hybrid mode at the time we last edited the page.  If that isn't the maximum map zoom level, then no closer aerial photography was available when we built the map link, and you'll probably be disappointed with what the aerial view shows.  (But see the exceptions given in the answer to the previous question.)  At that level, you will always be able to switch to Satellite or Map mode. 

In other cases, switching will give you a fine aerial view of the building and its precise location, but won't show you enough of the surroundings to give you a good idea of its general location.  Take note of the current position of the zoom slider (in the upper left corner of the map) before zooming out to see a larger area; then you'll be able to return to the original level if you wish to do so without reloading the entire page.

In some areas of the USA, and possibly elsewhere, the Satellite and Hybrid modes now offer one or two additional closeup levels, which may give a really spectacular view of the building.  In these places, the Hybrid view is the same as the Satellite view because there is no map data available for overlaying at that scale.

What other map controls are available?

None - Google Maps has a simple, easy-to-use interface, but that is accomplished by omitting some of the extra flexibility that other mapping services may offer.

(But see the description of the Reset button below.) 

The location marker (red icon) on the map is in the wrong place; how can I help fix it for future visitors?

This situation is most likely to occur when we knew the marker wasn't placed exactly.  Often that's because Google didn't offer good aerial photo detail at that time.  If so, you'll also find that we didn't set the initial zoom level as close as possible.  You may be able to zoom in closer and see better now than we could then.

If you really do know more than we do about where the marker should be, please help:

• You can verify our opinion of the marker placement accuracy by clicking on our marker; a popup balloon will appear, showing the latitude and longitude of that marker along with a word reflecting our opinion of the accuracy of placement of the marker.  (Click the "x" in the upper right corner of the balloon to make it go away.)  That word might be "exact" or "approximate" or even just "city"; in the last case, it might be far away from precisely where it ought to be.
• Click the "Fix it" button in the right panel of the map window to get quick instructions on how to report an improved location.
• Use the zoom and pan controls to improve your view of the map.  If Google doesn't provide overhead photography in sufficient detail, you may need to switch from Hybrid mode to Map mode - use the buttons at the upper right corner of the map.  When you are satisfied that you can see where the marker should be, at the closest useful zoom level, move your cursor until it points to that proper location on the map.  (Our preference is for the center of the base of the bell tower, if that's possible; but sometimes a different location is better for visibility and/or accuracy.)
• Click there, and watch another red marker appear at that point; click on that new marker, and you'll see a new info window with a line which reads as follows:
      "Click here to report this improved location."
• Do that, and you should see your email program open a new email message in which the subject line has already been set with the latitude and longitude of your newly-marked point.  In the body of that message, please explain why the point you've marked is an improvement on the original.  A verbal description of the building and/or tower and the location with respect to adjacent streets would be very helpful. 
• Send the message, and we'll take care of the rest (including checking whether a different zoom level is appropriate).  Thanks for your help!

I tinkered with the map controls too much, and now I'm lost.  How do I get back to the original version?

Use the "Reset" button which we have provided in the right panel of the map window.  This will eliminate any extra markers you have set, and restore the map without reloading the entire page.

But you could also use the "Reload" feature of your Web browser.  (This may be a menu selection or a toolbar button.) 

Why isn't the map embedded directly in the site data page?

Although it would be possible to do that, we want to keep the site data pages as simple as possible so that they will load and display as quickly as possible.  Embedding a map that not everyone will want to examine would slow down page loading for everyone, and we think that's a Bad Thing To Do.  Also, having the map displayed separately means that any change we make to how the map is generated will be instantly available to all site data pages which have Google Maps links.

Is there an easy way to get driving directions to/from the site?

Yes!  Just click the red map marker for the site.  A popup balloon will appear, showing the latitude and longitude of that marker along with a word reflecting our opinion of the accuracy of placement of the marker.  The last line of the balloon says "Directions: To here - From here".  Click one of those phrases, and the balloon will expand to include a field where you can type the destination or origin address.  (You may have to click in the field before you can start typing there.)  Then click the Get Directions button, and Google Maps will do the rest.  (Warning:  If your start and end points are not in the same country, and especially if they are not on the same continent, you might get very strange directions!)

[GCNA Home Page] [Site data top page] [Credits and Disclaimers] [Feedback]

This page was created 2006/02/26 and last revised 2007/10/23.

Please send comments or questions to csz_stl@swbell.net