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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.
The most important reason for the 5.3 seconds of longitude offset between the IERS Reference Meridian and the Airy transit circle is that the observations with the transit circle were based on the local vertical, while the IERS Reference is a geodetic longitude, that is, the plane of the meridian contains the center of mass of the Earth.
The maps cover the 4,000 square miles [10,500 km 2] of Los Angeles County — by far the most populous county in the nation — from the high desert to the coast. In 2009, there were an estimated 9.8 million residents, up from 9.5 million counted in the 2000 U.S. census, the basis for The Times' demographic analysis for each neighborhood and ...
U.S. Bureau of Land Management map showing the principal meridians of Louisiana, Mississippi, and Alabama. The Louisiana meridian, in longitude 92° 24′ 15″ west of Greenwich, extends from the Gulf of Mexico to the north boundary of Louisiana, and with the baseline through the initial point conforming to the parallel of 31° north latitude, governs all the surveys in the state west of the ...
Fueled by powerful winds and dry conditions, a series of ferocious wildfires erupted Tuesday and roared across the Los Angeles area, destroying hundreds of homes and killing at least 11 people ...
L.A. fire maps show Palisades, Eaton and more fires in California right now Emily Mae Czachor, John Kelly, Taylor Johnston, Grace Manthey Updated January 22, 2025 at 5:07 PM
This is a list of notable districts and neighborhoods within the city of Los Angeles in the U.S. state of California, present and past.It includes residential and commercial industrial areas, historic preservation zones, and business-improvement districts, but does not include sales subdivisions, tract names, homeowners associations, and informal names for areas.
This was the first meridian of the new Louisiana Purchase, which covered about 2,000,000 acres (8,100 km 2). There was much discussion regarding where the baseline would be, with the primary candidate originally being an extension of the Third principal meridian baseline. However, it was ultimately decided to use the confluence of the St ...