LC Subject Headings at MAGIC
The MAGIC Website uses the Library of Congress Classification for mapping and geo-spatial data, although in a modified form. For FTP users the following represents the underlying directory structure for all the data sets available. The naming convention of file names is explained after. The large amounts of data necessitates this structure.
Geography
G - Geography (General). Atlases. Globes. Maps. GA- Mathmatical Geography. Cartography. GB- Physical Geography. GF- Human Ecology. GN- Anthropology. GR- Folklore. GT- Manners and Customs (General). GV- Recreation. Leisure.
G - Geography (General). Atlases. Globes. Maps.
3700- United States 3715- Northeast Atlantic States 3720- New England 3780- Connecticut, General. 3781- Connecticut, By Subjects. 3782- Connecticut, By Natural feature. 3783- Connecticut, By Major Political Divisions (Counties, States, Provinces). 3784- Connecticut, By Cities, Towns, and townships. (A-Z)
3780 Connecticut, General
3781 Connecticut, By Subjects
3782 Connecticut, By Natural Feature (not currently used)
3783 Connecticut, By Major Political Division
F3 - Fairfield County H3 - Hartford County L5 - Litchfield County N3 - New Haven County N4 - New London County T6 - Tolland County W5 - Windham County
3784 Connecticut, By Cities, Towns, and townships. (A-Z)
Subject Codes
A- Special catagory maps. Arial and photomaps. B- Mathmatical geography C- Physical Sciences. Hydrography. D- Biogeography E- Human and cultural geography. Census data, housing and populations. F- Political geography. State, County, Town boundaries, etc. G- Economic geography H- Mines and mineral resources. J- Agriculture K- Forests and forestry L- Aquatic biological resources M- Manufacturing N- Technology. Power and transmission lines. P- Transportation. Roads, Railroads. Q- Commerce and trade R- Military and naval geography S- Historical geography
Subject Subdivisions
Note: Only the subdivisions currently in use for MAGIC data are shown.
| LCCS CODE |
What the Library of Congress means | What it is at MAGIC |
| 1993- | 1993 based data sets. (TIGER/LINE 93) | |
| 1994- | 1994 based data sets. (TIGER/LINE 94) | |
| A4- | Photomaps. Orthophotomaps. Pictomaps. | Digital Orthophoto 3.75 minute Quadrangles. |
| A8- | Special Geographical Names | Land names, Place names, and Waterbody names. |
| A9- | Special Format | Scanned Maps. |
| A99- | Unknown / Unclassified | |
| B3- | Geodetic surveys. | 7.5 minute quadrangle boundaries. |
| C2- | Physiography. Geomorphology. Relief features. | Digital Elevation Models. Physical Features. |
| C3- | Hydrology. Hydrogeology. Hydrography. | Hydrography. Waterbodies, rivers, lakes, streams. |
| C315- | Drainage Basins. | Drainage Basins. |
| C5- | Surficial Materials. | Surficial Materials. |
| E2- | Population. | Census population statistics (1970, 1980, 1990). |
| E6- | Social and Cultural geography. Civilizations. | Landmark features. Quality of Life indicators. |
| E68- | Education. | Education statistics. |
| E73- | Housing. Shelter. | Census housing statistics (1970, 1980, 1990). |
| F1- | General Political Geography. | Non-visable features. Fences. Right of Ways. |
| F7- | Administrative and political divisions. | State, county, & town boundaries. Census block, block group, tract, & place boundaries. Congressional and elections districts. |
| G1- | General Economic Geography. Economic conditions. | Government taxes and revenues. Economic statistics. |
| G4- | Land. Land Use. Land capabilities. | Land Use and Land Cover |
| G45- | Planning. | Planning regions. |
| G8- | Labor | Labor statistics. |
| J3- | Soils. Soil classification. Soil capability and utilization. | Soils and soil features. |
| N4- | Electric utilities. Power lines. Service areas. | Power Lines and underground conduits. |
| P2- | Roads. | Roads and streets. |
| P3- | Railroads. | Railraods. |
