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Welcome to the TopoQuest Map Viewer!
Altor, PA is a populated place located in Chester County at N39.97039° W75.66966° (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:  Unionville, PA    Map MRC: 39075H6
Map Center:  N39.97461°  W75.67562°    Datum: NAD83    Zoom: 16m/pixel

Places Within This Map View:
Place Type Coordinates (click to center)
AltorPopulated PlaceN39.97039° W75.66966°
Harmony HillPopulated PlaceN39.98177° W75.67216°
Harmony HillSummitN39.98261° W75.67827°
Valley CreekStreamN39.96789° W75.66633°
Broad RunStreamN39.98150° W75.66383°
TalcosePopulated PlaceN39.98705° W75.66577°
West Bradford Fire Company Station 39BuildingN39.95068° W75.67829°
CopesvillePopulated PlaceN39.95900° W75.65605°
MarshalltonPopulated PlaceN39.94983° W75.68022°
WoodbinePopulated PlaceN40.00344° W75.68188°
Devereux SchoolSchoolN40.00344° W75.68244°
Downingtown Post OfficePost OfficeN40.00179° W75.68799°
Taylor RunStreamN39.95400° W75.65049°
Township of East BradfordCivilN39.95895° W75.64687°
South Valley HillsRangeN40.00372° W75.65994°
AckworthPopulated PlaceN40.00788° W75.66827°
Hester ValleyBasinN40.00733° W75.68827°
East Bradford Township BuildingBuildingN39.97060° W75.63900°
East Bradford Township Police StationBuildingN39.97070° W75.63860°
Copeland SchoolSchoolN39.97066° W75.63827°
Bradford Heights Elementary SchoolSchoolN39.98900° W75.71050°
John Smedley RunStreamN39.98761° W75.63966°
Saint John Vianney CenterHospitalN40.01236° W75.68351°
Downingtown QuarryMineN40.01167° W75.66444°
Bradford HillsPopulated PlaceN40.00316° W75.64799°
Philadelphia YMCA CampLocaleN39.99316° W75.71078°
Downingtown Inn Golf CourseLocaleN40.01455° W75.67799°
Downingtown LibraryBuildingN40.00780° W75.69810°
Township of East CalnCivilN40.01467° W75.68239°
East Ward Elementary SchoolSchoolN40.01094° W75.69494°
Friends SchoolSchoolN40.01427° W75.68827°
Township of West BradfordCivilN39.96336° W75.71593°
Saint Joseph CemeteryCemeteryN39.98999° W75.71464°
Mary C Howse Elementary SchoolSchoolN40.00289° W75.64438°
Borough of DowningtownCivilN40.00762° W75.70190°
DowningtownPopulated PlaceN40.00650° W75.70327°
Broad RunStreamN39.93233° W75.67966°
Downingtown Police DepartmentBuildingN40.00527° W75.70544°
Downingtown Police StationBuildingN40.00540° W75.70550°
Brandywine Square Shopping CenterLocaleN40.01730° W75.68000°
Downingtown Boro HallBuildingN40.00520° W75.70590°
WCHE-AM (West Chester)TowerN39.96844° W75.63271°
Ashbridge Square Shopping CenterLocaleN40.01850° W75.68110°
Downingtown Fire Department - Alert Fire Company Station 45BuildingN40.00447° W75.70989°
Beaver CreekStreamN40.00761° W75.70772°
Chester County Education Service CenterBuildingN40.01760° W75.65890°
Downingtown Fire Department - Minquas Fire Company 2 Emergency Medical ServicesBuildingN40.01232° W75.70354°
East Caln Township BuildingBuildingN40.02170° W75.67810°
North Park PlazaLocaleN40.01177° W75.70466°
Woodwards CornerPopulated PlaceN39.97483° W75.72439°
WawasetPopulated PlaceN39.92650° W75.65938°
GrovePopulated PlaceN40.00483° W75.63466°
Downingtown Ninth Grade CenterSchoolN40.00900° W75.71383°
Beaver Creek Elementary SchoolSchoolN40.00233° W75.72022°
Blackhorse RunStreamN39.93928° W75.63632°
The Oaklands CemeteryCemeteryN39.97955° W75.62160°
Whitford StationLocaleN40.01427° W75.63855°
WhitfordPopulated PlaceN40.01455° W75.63771°
Pennsylvania State Police StationLocaleN39.94789° W75.72383°
Pennsylvania State Police BarracksBuildingN39.94789° W75.72383°
West Whiteland Post Office (historical)Post OfficeN40.01400° W75.63688°
Pennsylvania State Troop J Embreeville Police StationBuildingN39.94780° W75.72400°
NorthbrookPopulated PlaceN39.92039° W75.68883°
Beaver Creek DamDamN40.03011° W75.66632°
Downingtown West High SchoolSchoolN40.01177° W75.71800°
Brandywine HuntPopulated PlaceN39.99500° W75.62300°
GallaghervillePopulated PlaceN39.99900° W75.72689°
Indian Hannah RunStreamN39.92006° W75.69144°
Kresher Israel Congregation ChurchChurchN39.97740° W75.61880°
Saint Agnes CemeteryCemeteryN39.98149° W75.61910°
OaklandPopulated PlaceN40.02038° W75.64160°
Bradford Plaza Shopping CenterLocaleN39.95950° W75.61970°
Embreeville State HospitalHospitalN39.94622° W75.72633°
WindonPopulated PlaceN39.95210° W75.62190°
East Branch Brandywine CreekStreamN39.92261° W75.64938°

Note: Coordinates listed above are datum selected on the sidebar.
Click on map to:
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Map contents:
Choose Automatically
Overall Coverage
1:24K Coverage (US)
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1:100K Topo maps (US)
1:250K Coverage (US)
1:250K Topo maps (US)
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Satellite 1m (US)

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Map Size:
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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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