FINAL PROJECT

By Matt Ferryman

Central Ohio Covered Bridges

Purpose:

This project highlights the covered bridges in Central Ohio that
are still active today. In total, there are 33 covered bridges in the
counties including Union, Madison, Franklin, Delaware, Pickaway, Licking
are Fairfield. I created two separate maps that displays all of the data.

Methods:

I wrote my own JavaScript code of all the bridge locations and information
as well as finding pictures of all the bridges. There are three different base
maps that you can choose from to view the central Ohio area. In the trusstype
information section, the color of the name of the truss corresponds to the colors
of the circles on each of the maps. I found all of the information on two websites
which were Bridgehunter.com and Coveredbridgemap.com.

Interesting Facts:

-There is only covered bridge left in Franklin County: Bergstresser
-Fairfield County has the covered bridges in the area: 16
-The most common covered bridge type: Kingpost-17
-The Partridge trusstype is a special truss and only 5 exist in the US

FIRST MAP

This is an interactive map that displays all of the bridges in central
Ohio with the popup content boxes displaying the name of the bridge, the
city it is located, the year built, and trusstype. All of the points are
color coated by trusstype.

FIRST MAP

SECOND MAP

This map I created on the Mapbox website and it also displays the covered
bridges in a color coated fashion very similar to the first map. The popup content
includes the name of the bridge and a picture of the bridge as well for visual.

SECOND MAP

TRUSSTYPE INFORMATION

Queenpost

This type of covered bridge has two central supporting posts and can span
longer openings than a Kingpost truss.The two upright posts are placed one-third
of the way from the end of the truss and are connected across the top by a beam
and use a diagonal brace between the outer edges.

Queenpost

Kingpost

This type of covered bridge has the simplest form of truss where two diagonal
braces connect two one vertical support post in the center.

Kingpost

Partridge

The trusstype is named after Reuben Partridge which has a slight modification
than the Smith truss, and there are only 5 left standing in the United States.

Partridge

Pratt

This trusstype has vertical and diagonal braces that slope down towards the center
The interior diagonals are under tension under balanced loading and vertical elements
under compression.

Pratt

Howe

This rare trusstype includes vertical and diagonal braces that slope up towards the
center which is the opposite of a Pratt truss. These braces are members in tension.

Howe

Childs

This trusstype was used exclusively by an Ohio bridge builder named Everett Sherman
who used Horace Childs' design which was a multiple kingpost with the addition of iron rods.

Childs

6-panel

This truss has 6 panels or braces that are used as the support and can slope vertically
or diagonally and usually are a subcategory of a queenpost truss.

6-panel

Further Research:

I can create a geolocator popup that finds your current location and then tells you the closest
covered bridge in your area and information provided. I also could create a popup that allows the user
to show which type of bridge they want to see with check boxes. It may also be beneficial to add another
basemap that just shows the county layer if that is more useful to the user than maps showing cities.

Limitations:

If I could have created a script that ran on the Coveredbridgemap.com website, then I could have
a bigger map that showed all of the covered bridges in Ohio. However, some of the information on that
website was incorrect, so I used other information from Bridgehunter.com to get the accurate data.

Sources:

-Bridgehunter.com
-Coveredbridgemap.com
-Wikipedia.com
-GEOJSON Lab
-Interactive Mapping Lab