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Figure 1. This BLM map depicts the principal meridians and baselines used for surveying states (colored) in the PLSS. The following are the principal and guide meridians and base lines of the United States, with the year established and a brief summary of what areas' land surveys are based on each.
Defining the extent of an area is necessary in order to tabulate census data for that area. ZCTAs are generalized area representations of the United States Postal Service (USPS) ZIP code service areas, but are not the same as ZIP codes. Individual USPS ZIP codes can cross state, place, county, census tract, census block group and census block ...
A thorough search is important so that no records are overlooked. Copies of deeds are usually in the government recorder's office, and maps or plats can usually be found at the recorder or surveyor's office. These arrangements will vary state-to-state and survey-system-to-survey system, so local familiarity is important.
State boundary; Railroad district (12 total, county boundaries) County; In Texas, the highest level of land subdivision is the boundary of the state itself. Below this are the Texas railroad districts, of which there are 12. These are Spanish grants, surveyed on the "metes and bounds" system of measurement, and are of irregular shape and size.
Online maps can be basically divided by the covered area (global or local) and by the representation of this area (classic drawn or orthophoto). Global online maps [ edit ] These maps cover the world, but may have insufficient details in some areas.
The National Map Corps consists of volunteers who devote some of their time to provide cartographic information to the U.S. Geological Survey. The only requirements to participate are having access to the Internet and a current familiarity with the area being mapped. [6] This data is used to update The National Map.
Outside a specific state plane zone accuracy rapidly declines, thus the system is not useful for regional or national mapping. Most state plane zones are based on either a transverse Mercator projection or a Lambert conformal conic projection. The choice between the two map projections is based on the shape of the state and its zones. States ...
Conneautville was founded in 1814 by Alexander Power, a surveyor and engineer. Conneautville was first called "Powerstown" or made reference to as "Power's Tract". Power wanted it called "Conneautville" after the Seneca name Conneaut or Conneautee, meaning "Snow Place" according to one interpretation. [citation needed]