Map contents

Working with layers and map contents

This mapping application uses content sources called services. Each service contains one or more map layers. A map layer is a type of data shown on the map, such as roads, towns, or aerial imagery.

This mapping application allows you to view the list of the contents of the map, turn on and off layers, and examine the symbols for layers.

To examine the map contents

To view the Map Legend

Map Scales

The map scale shown in the Map Screen is given in an absolute ratio of independent units. This means one unit on the map is equal to the corresponding number of the same units on the ground. For example, a scale of 1:32000 means that 1 inch = 32,000 inches or 1 foot = 32,000 feet depending on the unit used.

The following table provides a list of all of the map scales in the mapping application and their inch to feet equivalent for mapping purposes.

Map scale Inch to feet equivalent
1:600 1"=50'
1:1200 1"=100'
1:2400 1"=200'
1:4800 1"=400'
1:7200 1"=600'
1:16000 1"=1,333'
1:32000 1"=2,667'
1:64000 1"=5,333'
1:125000 1"=10,417'
1:250000 1"=20,833'
1:400000 1"=33,333'
1:500000 1"=41,667'

As a reminder, not all of the layers are visble at all scales. The following table provides a list of the data layers in the mapping application and their visible scales.

Data category Data layer Visible scales
Land Records Tile Boundaries All scale levels
ZIP Codes All scale levels
Address Points 1:600, 1:1200, 1:2400
Road Centerline 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Parcel Boundaries: Labels 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000
Parcel Boundaries 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Subdivisions: Labels 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000
Subdivisions 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000
Districts Ag Districts 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000, 1:250000
Airport Impact OD All scale levels
Mountainside OD 1993 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000, 1:250000
Historic Districts 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
Historic District - Towns 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
Quarry Notification OD All scale levels
Conservation Easements 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000, 1:250000
Reservoir Protection Area 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
Rt 28 Tax District All scale levels
Rt 28 Elected OD All scale levels
Rt 28 Optional OD All scale levels
Village Conservation OD All scale levels
Steep slopes 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
Subdivision Control Limits All scale levels
Limestone OD All scale levels
Districts Metrorail Metrorail Stations: Labels 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
Metrorail Stations Planned All scale levels
Metrorail Track Proposed All scale levels
Station Service Districts: Labels 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
Station Service District All scale levels
Metrorail Service District All scale levels
Election Districts Polling Places All scale levels
VA House 2011 All scale levels
VA Senate 2011 All scale levels
Precincts All scale levels
Election Districts 2011 All scale levels
Election Districts 2001 All scale levels
Environmental Health Cemetery: Labels
(internal only)
1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000
Cemetery
(internal only)
1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
Pollution Sources: Labels 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000
Pollution Sources 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
Drainfields: Labels 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000
Drainfields 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Wells: Labels
(some features internal only)
1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000
Wells
(some features internal only)
1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Environmental Soil Point Features 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000
Soils 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000
Soil Drains 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000
Topography 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000
Virginia Scenic Rivers All scale levels
Flood Cross Sections 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
Floodplain All scale levels
Hydric Soils 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
Watersheds All scale levels
Wetlands Model 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000
Forest 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000. 1:64000
Planning CTP Roads 2010
(internal only)
All scale levels
Comp Plan Overlays All scale levels
Traffic Analysis Zones (TAZ) All scale levels
Census 2010 - Tracts All scale levels
Census 2010 - Block Groups All scale levels
Census 2010 - Blocks All scale levels
Census 2010 - CDP All scale levels
Planned Land Use All scale levels
Planning Subareas All scale levels
Policy Areas All scale levels
Suburban Communities 2001 All scale levels
Public Safety Public Safety Station All scale levels
Rural Water Supply 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000
Hamilton Fire Hydrants 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Leesburg Fire Hydrants 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Lovettsville Fire Hydrants 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Purcellville Fire Hydrants 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Round Hill Fire Hydrants 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Loudoun Water Fire Hydrants 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Fire Box Areas All scale levels
Fire First Due Area All scale levels
LCSO Patrol Sectors All scale levels
EMS First Due Areas All scale levels
Schools School Sites All scale levels
Zones - Elementary All scale levels
Zones - Middle All scale levels
Zones - High All scale levels
Utilities Telecom Towers All scale levels
Major Power Lines All scale levels
Stormwater BMPs 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Stormwater Structures 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Stormwater Pipes 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Loudoun Water Gravity Sewer
(internal only)
1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Loudoun Water Force Main
(internal only)
1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Loudoun Water Water Pipe
(internal only)
1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000
Zoning Leesburg Zoning 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000, 1:125000
1972 Zoning Ordinance All scale layers
Zoning: Labels 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000
Zoning All scale layers
Rezoning - ZMAP: Labels 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000
Rezoning - ZMAP All scale layers
1/7/03 - 5/19/05
(internal only)
All scale layers
Pre - 1/7/03
(internal only)
All scale layers
Base Layers County Boundary All scale levels
Town Boundaries All scale levels
Major Roads All scale levels
Buildings 1:600, 1:1200, 1:2400, 1:4800, 1:7200
Fences 1:600, 1:1200, 1:2400
Road Casings 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000
Major Streams All scale levels
Base Map Drains 1:600, 1:1200, 1:2400, 1:4800, 1:7200, 1:16000, 1:32000, 1:64000
Water Bodies All scale levels
Imagery Imagery All scale levels