All you really need is a collection of coordinates, or even just one pair of coordinates; adding a "name" to each point is not necessary, but very helpful (and it lets GPS Visualizer know that you're uploading waypoints rather than a sequence of trackpoints).
For this example, I'll use the tallest Cascade Range volcanoes in southern Washington and Northern Oregon. The easiest way to organize your data is using a spreadsheet, like Microsoft Excel. On the left, below, is a screen shot of an Excel worksheet, and on the right is the same data in simple, comma-separated format.
To make a map from data like this, just cut and paste the data from Excel or your text editor into the text area on GPS Visualizer's map form. (When you copy data from Excel, it gets pasted with tabs, which will work fine but might look strange.) If you prefer, you can also save the file as tab-delimited text (.txt) or a comma-separated values (.csv) and then upload the file to GPS Visualizer.
For now, let's use the standard map form with the default settings, but with the output format set to JPEG and the size set to 300 for simplicity's sake. (Go ahead and try it using the data in the box above.) After clicking the "Draw a map" button, the resulting graphic should look like the map on the left.
Here's the most important thing I can emphasize about creating plain-text data files for GPS Visualizer: Having a sensible "header row" above your data is VERY important. The order of the fields is NOT important. Spaces between fields and capitalization of the header row aren't important either. So "name,latitude,longitude" is identical to "NAME, latitude , Longitude." These "not important" factors are a big part of what makes this program so powerful: chances are, if a human could read your data and make sense of it, so can GPS Visualizer. Include as many or as few fields as you want; as long as a waypoint contains information that might let you plot it on a map, GPS Visualizer will try.
Now, let's add a "description" field to each point (usually abbreviated as "desc"). For now, we'll put the full name of the mountain, along with the state it's in. So Rainier's description is "Mount Rainier, Washington."
We'll also add a field that contains the height of each mountain. I'll call it "alt" to keep it short, but you could also use "altitude" or "elevation." NOTE: if no units are specified, GPS Visualizer will think your numbers are metric (meters for elevation, km/h for speed, etc.); but, in this example, we have our elevation data in feet, so we need to call the field "alt (feet)" or "alt (ft)".
There's something very important to notice about this comma-separated data: the items in the "desc" column MUST be enclosed in quotes because there is a comma inside each description. Without the quotes, everything would be shifted back one column, and the altitude of the first two points would be listed as "Washington"!
Voila. If you think the text is too small, you can always increase the "text size" box in the map form. (This will only affect JPEG/PNG and SVG maps, though, not Google Maps or Google Earth.) Also, if you don't mind dealing with SVG files, you might try that, as they look much cleaner than JPEGs.
The nice thing about storing your raw data in a spreadsheet like Excel is that you can manipulate the fields as needed. This is especially helpful for the description field. Let's say we want to display the height of each mountain on the map. All we have to do is concoct a simple Excel formula that reads the "alt" field and adds it to the end of the existing "desc" field. Since the column with the formulas in it will need to be called "desc" in order for GPS Visualizer to recognize it, we'll rename the original "desc" column to "full name," which GPS Visualizer will ignore.
In the screen shot below, you can see the formula in cell C2 laid bare for the world to see; in cells C3 through C5, the results of the formula are visible.
Maybe we should have just put the altitude by itself in the description field; it's getting a little messy. Oh well, there's no harm in experimenting.
Note that if your output format supports HTML in waypoint names or descriptions (i.e., you are creating a Google Map or Google Earth KML file) you can build descriptions that contain HTML formatting, which can be very, very useful. For example, you can include line breaks via the <BR> tag; in fact, you could conceivably include an entire table of information in the description of each point.
One more thing: you can now give instructions to GPS Visualizer to synthesize a name or description based on your fields (look for synthesize name and synthesize desc. in the "Advanced waypoint options"). With this feature, you can create interesting names and descriptions without having to use Excel. (Click here for an example using dynamic data and the "synthesize" variables.)
Each of your points can have its own color, defined by a "color" field. In our example data, we'll assign red to peaks over 14,000 feet high, green to peaks that are at least 11,000 feet, and blue to the rest.
Colors can be either "named" HTML color values (blue, green, red, black, fuchsia, olive, skyblue, papayawhip, etc.) or hex-formatted RGB values (#0000FF, #82B3CE, etc.).
And yes, "papayawhip" is really a recognized HTML color.
Now we're going to turn away from those simple JPEG maps for a moment, because in JPEG, PNG, and SVG maps, you have no control over what kind of marker ("symbol") appears for each waypoint; it's always a circle. In Google Maps and Google Earth, however, you can use a different marker style, either for all points or each point individually.
Here's GPS Visualizer's list of available pre-defined symbols in Google Maps:
And, for Google Earth:
So, let's make a Google Map using triangles and squares. We'll say that triangles represent volcanoes that have erupted in historic time (Rainier & Hood), and squares are volcanoes that have been dormant longer (Adams & Jefferson).
The map on the left is a live, interactive Google Map; note that if you put your mouse pointer over one of the markers, the name shows up. If you click on a marker, an info window pops up with the name of the point in bold at the top, and the description below. (This is where including HTML in a description could come in handy.)
GPS Visualizer now accepts absolute URLs in the "symbol" field for Google Maps, and it will try its best to make your custom symbols display properly without you doing any extra work. (However: if you also supply an "icon_size" field that contains something like "12x20", you'll make GPS Visualizer's task a little easier.) More info will be coming soon.
Google Earth makes it very easy to incorporate custom icons into your maps: all you need to supply is the URL of the icon graphic (even photograph thumbnails will work), and GE will take care of the rest. Google Earth can even colorize them if you supply a "color" field.
Google Earth also has hundreds of "standard" icons that you can easily use. To see all of them, click here; to find the URL of one of the icons on that page, right-click on the graphic and choose the appropriate command to find its URL. (In Firefox, it's "Copy image location.")
Using the "quantitative data" input form, you can have GPS Visualizer resize or colorize your waypoints based on a field (or fields) of your choice. It's not hard to do, but this feature is important enough to warrant its own tutorial.
It's possible to specify the location of a waypoint using information other than coordinates: address, city, state, ZIP code, country, airport code, etc.
NOTE: If your entire data file is a collection of addresses, you will find it MUCH easier and more efficient in the long run to use GPS Visualizer's Batch Geocoder to add coordinates to your points before proceeding; then you can skip this section altogether.
As always, the header row on your data is important, and preserving the structure of the columns is crucial: you can't put an airport code in the "latitude" column or a city name under "airport." In this next example, I've added Seattle and Portland to the file, using two different methods. For Seattle, I've supplied a city and state; for Portland, just its airport code. The unknown fields are left blank. (In the .csv data file on the right, that means multiple commas with nothing between them.)
The resulting map is just as you'd expect: a yellow pin on Seattle, and an orange airport icon just northeast of Portland (at the location of PDX, Portland's airport).
If you want to retrieve the coordinates of points for which you don't know the latitude and longitude, send your data through GPS Visualizer's geocoding utilities rather than the map form. This is helpful because then, in the future, you can format those rows the same as the rest, and GPS Visualizer won't have to work so hard to locate your waypoints.
Entering an address or a city and state to find a location is far from an exact science. When you enter an address in the United States, GPS Visualizer first attempts to find it in a local database containing geocoding information from the U.S. Census Bureau; this database is not 100% accurate, and you may find addresses plotted on the wrong side of the street or worse. C'est la vie. If the Census database doesn't work, the Google and/or Yahoo geocoding Web services are consulted. But sometimes, it's still not right. When that happens, you may have to enter the coordinates into your file by hand.
Further documentation coming soon. Suffice it to say that if your input data includes a "url" field, the point's info window will contain a link to that URL. (For SVG maps, the marker itself becomes a link.)
More information will be coming soon, but you can see an example here. Basically, in Google Maps and Google Earth, you can do a lot with fields in your input file named "thumbnail", "photo", and (optionally) "thumbnail_width".
Here's a list of the fields that are important in terms of how GPS Visualizer handles your waypoints. Alternate names are separated by slashes; for example, you can specify latitude with "lat" or "latitude."
(For a "live" demonstration of how many of these fields work with Google maps, click here.)
|name||the name of a point, as displayed on the map; use "-" for no name|
|desc/description||can contain almost anything, especially if your goal is Google Maps or Google Earth files; use "-" for no description|
|longitude/lon/long||ideally should be decimal degrees, but degrees-minutes-seconds format also works as long as the parts are separated (just be sure that western coordinates are either negative numbers or include a "W")|
|latitude/lat||see note under "latitude"|
|time/date||try to use a non-ambiguous time format, like yyyy-mm-dd hh:mm:ss; if you submit "04/05/06," the computer doesn't know what that means|
|alt/altitude/elevation||will be interpreted as meters unless "(ft.)" or "(feet)" is included in the field name|
|speed/velocity||will be interpreted as km/h unless "(mph)" or "(m/s)" is included in the field name|
|airport||3- or 4-letter airport code; used in place of latitude & longitude|
|color||named HTML color or hex value|
|hotspot||Google Earth only; two numbers joined by a comma (x & y; y=0 is the bottom of the icon); used for custom placemark icons. (In Google Maps, use icon_anchor, where y=0 is the TOP of the icon)|
|sym/symbol/icon||Google Maps or Google Earth only; see "Adding symbols" above|
|scale||a ratio (0.5 = half-size, 2.0 = double-sized)|
|opacity||from 0 to 1|
|rotation||degrees clockwise (same units as a "heading" would be); can be used with any icon in Google Earth, or with the "tickmark" icon in Google Maps|
|url||turns your waypoint into a link; see "Adding URLs" above|
|label||Google Maps only; puts a "permanent" label on the map rather than just a tooltip.|
|label_color||Google Maps or Google Earth only; sets the color of a marker's permanent label on the map.|
|label_scale||Google Earth only; sets the size for a marker's label on the map, as a percentage/proportion of the "normal" size.|
|shortdesc||Google Maps or Google Earth only; if you have your Google Map generate a marker list that includes descriptions, the "shortdesc", if it exists, will be used in place of the normal "desc" in the list. In Google Earth, the short description will go in the KML <snippet> tag, which is displayed in GE's sidebar.|
|thumbnail||the URL of a graphic; in Google Maps, it becomes part of the mouse-over; in Google Earth, it becomes the icon for that point (see #9 above)|
|photo||the URL of a larger photo; in Google Maps & Google Earth, it becomes part of the description of the point|
|address, city, state, country/nation||used in place of latitude & longitude|
|zip/zipcode/postcode||used in place of latitude & longitude|
|folder||Google Maps (with a "marker list") & Google Earth only; you can create collapsible/hideable folders of waypoints and/or tracks if you provide the name of a folder. In Google Earth, you can go one level deeper by separating folders and subfolders by backslashes; for example, you could use "Campgrounds\Public" and "Campgrounds\Private", and a Campgrounds folder would be created, with Public and Private folders inside.|
|circle_radius||This is an unusual one. If you supply a distance in the circle_radius field (e.g., "10 km" or "100 mi."), GPS Visualizer will draw a "range ring" of the specified radius around your point. Note that if your waypoint has a color or opacity supplied, those attributes will be applied to the circle. (If you don't supply a unit, the number given will be assumed to be kilometers.)|
|Google Maps options|| I've included these in a separate section because they're a bit esoteric and ONLY used with Google Maps.