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Welcome to the TopoQuest Map Viewer!
Byrnes Island, MD is a island located in Washington County at N39.32982° W77.74055° (NAD83). This is the nearest place in the USGS place names database to the center of the map view below.  Look below the map view for a list of other places and locations that are visible within this map view.  If you need to locate a landmark or feature, you can search for its location on our Find Places page.  If you need to locate a specific USGS topographic map, try our Find Maps page.

USGS Map Name:  Harpers Ferry, WV    Map MRC: 39077C6
Map Center:  N39.33014°  W77.73997°    Datum: NAD83    Zoom: 8m/pixel

Places Within This Map View:
Place Type Coordinates (click to center)
Byrnes IslandIslandN39.32982° W77.74055°
Lock 34DamN39.33288° W77.73833°
Harpers Ferry Historic DistrictParkN39.32538° W77.73972°
Harpers FerryPopulated PlaceN39.32538° W77.73888°
Town of Harpers FerryCivilN39.32533° W77.74105°
Curtis Freewill Baptist ChurchChurchN39.32510° W77.74138°
Barr SpringSpringN39.32510° W77.73722°
Harpers Ferry Police DepartmentBuildingN39.32659° W77.74485°
Camp HillSummitN39.32415° W77.74106°
Harpers Ferry Post OfficePost OfficeN39.32659° W77.74496°
Storer College (historical)SchoolN39.32399° W77.74138°
Friendship Fire CompanyBuildingN39.32663° W77.74536°
Long Canal (historical)CanalN39.33538° W77.74416°
Lake Quigley (historical)ReservoirN39.32205° W77.73972°
Halls Rifle Works (historical)BuildingN39.32177° W77.74055°
Virginius (historical)Populated PlaceN39.32149° W77.73972°
Virginius IslandIslandN39.32149° W77.73916°
Herrs Mill (historical)LocaleN39.32177° W77.73722°
Potomack CanalCanalN39.32177° W77.74277°
Harper CemeteryCemeteryN39.32315° W77.73416°
Herrs Dam (historical)DamN39.32038° W77.73860°
PleasantvillePopulated PlaceN39.33982° W77.73777°
Free Church (historical)ChurchN39.32316° W77.73277°
Saint Johns Episcopal Church (historical)ChurchN39.32316° W77.73277°
Hall Island (historical)IslandN39.32038° W77.74333°
Wernwags Sawmill (historical)LocaleN39.32121° W77.73471°
Jefferson RockPillarN39.32288° W77.73249°
The StaircaseRapidsN39.31955° W77.74277°
Saint Peters School (historical)SchoolN39.32260° W77.73166°
United States Armory and Arsenal at Harpers Ferry (historical)MilitaryN39.32389° W77.73056°
Saint Peters Roman Catholic ChurchChurchN39.32260° W77.73138°
Harpers Ferry National Historical ParkParkN39.31870° W77.74190°
Dam Number 3DamN39.33394° W77.75106°
The Joy of Learning MontessoriSchoolN39.32404° W77.75010°
Potomac River Dam Number 3DamN39.33343° W77.75138°
Lower TownPopulated PlaceN39.32316° W77.73027°
Herrs Island (historical)IslandN39.32149° W77.73166°
John Browns Fort (historical)MilitaryN39.32306° W77.73028°
Bolivar CemeteryCemeteryN39.32870° W77.75194°
John Brown MonumentParkN39.32316° W77.72999°
Arsenal SquareLocaleN39.32288° W77.72999°
Baltimore and Ohio Railroad Covered BridgeBridgeN39.32427° W77.72860°
Town of BolivarCivilN39.32421° W77.75173°
Lock Number 35DamN39.33677° W77.75138°
The PointCapeN39.32288° W77.72860°
Shenandoah Bridge (historical)BridgeN39.32149° W77.72944°
Winchester and Potomac Railroad BridgeBridgeN39.32371° W77.72777°
Lock 33DamN39.32482° W77.72694°
Potomac Ferry (historical)CrossingN39.32343° W77.72749°
Shenandoah RiverStreamN39.32260° W77.72777°
BolivarPopulated PlaceN39.32343° W77.75277°
Lock Number 36DamN39.33705° W77.75305°
Fort Duncan (historical)MilitaryN39.34167° W77.75028°
Bolivar Christian Academy (historical)SchoolN39.32796° W77.75542°
Loudoun Heights TrailTrailN39.31427° W77.74249°
Bolivar - Harpers Ferry Public LibraryBuildingN39.32420° W77.75650°
Harpers Ferry Middle SchoolSchoolN39.32272° W77.75602°
Bolivar HeightsRidgeN39.32811° W77.75807°
Elks RunStreamN39.33538° W77.75805°
White Horse RapidsRapidsN39.32246° W77.71924°
Lock 32DamN39.32399° W77.71860°
Loudoun HeightsSummitN39.30787° W77.73860°
Warner SpringSpringN39.30816° W77.74555°
Klein SpringSpringN39.30843° W77.74694°
Stone Fort (historical)MilitaryN39.34028° W77.71722°
Meyer SpringSpringN39.33316° W77.76555°
Maryland HeightsSummitN39.34132° W77.71638°
Piney RunStreamN39.32149° W77.71360°
Loudoun HeightsPopulated PlaceN39.31316° W77.71777°
Walker SpringSpringN39.30260° W77.74944°
Sandy HookPopulated PlaceN39.32593° W77.71055°
Potomac WaysideParkN39.32010° W77.71194°
Harpers Ferry SpringSpringN39.33621° W77.76916°
Blue Ridge ClubLocaleN39.32066° W77.70860°
Sandy Hook Census Designated PlaceCensusN39.32851° W77.70515°

Note: Coordinates listed above are datum selected on the sidebar.
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Map contents:
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Coordinate format:
Nddd.ddd°  Wddd.ddd°
Nddd°mm.m'  Wddd°mm.m'
Nddd°mm' ss"  Wddd° mm' ss"

Draw crosshair at center

Note (5/31/2016) - Want a crosshair at the center coordinates of the map?  A number of people have asked, so that option has been added!

Note (6/26/2013) - Map sizes are now larger, and an extra-large (1280x1280) option has been added as well.

Note (8/18/2010) - The transition to the new TopoQuest server is now complete.  Aside from a glitch that affected the TopoZone alternative map.asp script much of Monday (8/17/2010) afternoon and evening, all went pretty smoothly.  Response time of the TopoQuest website overall should be much snappier, and addition of more 1m satellite / aerial imagery is back underway!

Note (8/2/2010) - Full USGS 1:100K and 1:250K topographic map coverage of the continental US is now completed and online.  Plus, I have the new TopoQuest server under construction with a 9TB RAID6 disk array to continue adding satellite/aerial photo coverage.  Yay!

Note (7/21/2009) - Locations of places of interest (from the USGS placenames database) within the map area you are viewing are now listed below the map when viewing at 64m/pixel or below.  You can click the name of the place to go to its description page, or click the coordinates to recenter your map view on that place.

Note (6/1/2009) - We've started adding 1m/pixel aerial and satellite imagery, starting with Oregon and slowly branching out from there.  Please be patient, it takes a very long time to download and process all this imagery, as well as huge amounts of disk space!

Note (3/07/2009) - We've started adding 1:100K and 1:250K scale USGS topographic maps, starting with southern Oregon and moving out from there.  Coverage will be a bit sparse at first while we crank up automated processing of map tiles at these topographic map scales.  To view 1:100K and 1:250K scale topos, you'll need to manually select them from the sidebar (the Choose Automatically selection will not select these map scales until we have more coverage).  You can use the coverage map types to see what areas we've already processed and have online.  Also note that satellite photo coverage isn't meant to be particularly useful at this point, it's just (very) experimental.

Note (7/31/2008) - We've started adding 1:50K scale topographic maps of Canada, starting with British Columbia.  The Canadian topographic map coverage is still a bit experimental, and integration into the map viewer still needs a little work.  The map viewer will not yet automatically select the 1:50K scale topographic maps, so if you're trying to view maps in Canada, you may need to manually switch to the 1:50K Topo Maps selection in the Map Contents section of the sidebar.

Note (4/15/2008) - With the demise of non-subscription access to TopoZone (now merged with, a subscription service), we're scrambling to process all topographic maps for the US and make them available as quickly as possible.  We now have four Linux PC's crunching map data 24/7 to produce and index map data continuously.  We should be adding approximately fifteen 1 degree x 1 degree blocks of map data (approximately 1000 individual 7.5 minute 1:24000 topo maps) per day.  We're starting with southern Oregon (because that's where we live!) and northern California and branching out from there.

TopoZone URL Replacement
Do you have a Topozone map URL that you want to convert to the TopoQuest equivalent?  Simply replace with in the URL, and you'll get the equivalent map as what Topozone used to produce!  We have more details on using TopoQuest as a Topozone alternative on our Topozone Replacement page.

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