{
	"geographicCRS": {
		"EPSG:4269": {
			"code": "EPSG:4269",
			"name": "NAD83",
			"type": "geographic",
			"datum": {
				"name": "North American Datum 1983",
				"ellipsoid": "GRS 1980",
				"type": "geodetic"
			},
			"areaOfUse": {
				"description": "North America - onshore and offshore: Canada, Mexico, United States",
				"bbox": {
					"north": 90,
					"south": 14.92,
					"east": -47.74,
					"west": 167.65
				}
			},
			"accuracy": {
				"horizontal": "1-2m relative to ITRF",
				"note": "Original realization, superseded by NAD83(2011) for high-accuracy work"
			},
			"remarks": "Standard geographic CRS for North America. For high-accuracy applications, use NAD83(2011).",
			"useCases": [
				"General mapping in the United States",
				"Legacy data compatibility",
				"GIS data exchange"
			],
			"deprecated": false
		},
		"EPSG:6318": {
			"code": "EPSG:6318",
			"name": "NAD83(2011)",
			"type": "geographic",
			"datum": {
				"name": "NAD83 (National Spatial Reference System 2011)",
				"ellipsoid": "GRS 1980",
				"type": "geodetic"
			},
			"areaOfUse": {
				"description": "United States (USA) - CONUS and Alaska - onshore and offshore",
				"bbox": {
					"north": 74.71,
					"south": 14.92,
					"east": -63.88,
					"west": 167.65
				}
			},
			"accuracy": {
				"horizontal": "1-2cm relative to ITRF",
				"note": "Current reference frame for high-accuracy positioning in the US"
			},
			"remarks": "Latest realization of NAD83. Recommended for all new high-accuracy surveying and geodetic work.",
			"useCases": ["High-accuracy surveying", "Geodetic control", "GNSS applications"],
			"deprecated": false
		},
		"EPSG:4267": {
			"code": "EPSG:4267",
			"name": "NAD27",
			"type": "geographic",
			"datum": {
				"name": "North American Datum 1927",
				"ellipsoid": "Clarke 1866",
				"type": "geodetic"
			},
			"areaOfUse": {
				"description": "North America - onshore - Canada and United States",
				"bbox": {
					"north": 77.75,
					"south": 14.92,
					"east": -55,
					"west": -141
				}
			},
			"accuracy": {
				"horizontal": "Variable, typically 10-100m",
				"note": "Legacy datum with significant distortions"
			},
			"remarks": "Deprecated. Convert to NAD83 for modern applications. Transformation requires NADCON grids.",
			"useCases": ["Historical data interpretation", "Legacy system compatibility"],
			"deprecated": true
		}
	},
	"projectedCRS": {
		"EPSG:5070": {
			"code": "EPSG:5070",
			"name": "NAD83 / Conus Albers",
			"type": "projected",
			"baseCRS": "EPSG:4269",
			"projection": {
				"name": "Albers Equal Area Conic",
				"method": "Albers",
				"parameters": {
					"latitudeOfFalseOrigin": 23,
					"longitudeOfFalseOrigin": -96,
					"standardParallel1": 29.5,
					"standardParallel2": 45.5
				}
			},
			"areaOfUse": {
				"description": "United States (USA) - CONUS onshore",
				"bbox": {
					"north": 49.38,
					"south": 24.41,
					"east": -66.91,
					"west": -124.79
				}
			},
			"accuracy": {
				"horizontal": "Preserves area",
				"note": "Equal-area projection for continental US"
			},
			"remarks": "Equal-area projection for the continental United States. Ideal for thematic mapping and area calculations.",
			"useCases": ["Area calculations across CONUS", "Thematic mapping", "Statistical analysis"],
			"deprecated": false
		},
		"EPSG:6350": {
			"code": "EPSG:6350",
			"name": "NAD83(2011) / Conus Albers",
			"type": "projected",
			"baseCRS": "EPSG:6318",
			"projection": {
				"name": "Albers Equal Area Conic",
				"method": "Albers",
				"parameters": {
					"latitudeOfFalseOrigin": 23,
					"longitudeOfFalseOrigin": -96,
					"standardParallel1": 29.5,
					"standardParallel2": 45.5
				}
			},
			"areaOfUse": {
				"description": "United States (USA) - CONUS onshore",
				"bbox": {
					"north": 49.38,
					"south": 24.41,
					"east": -66.91,
					"west": -124.79
				}
			},
			"accuracy": {
				"horizontal": "Preserves area",
				"note": "Equal-area projection based on latest NAD83 realization"
			},
			"remarks": "Recommended for area calculations across the continental US. Based on NAD83(2011) for improved accuracy.",
			"useCases": [
				"Area calculations across CONUS",
				"Modern thematic mapping",
				"Environmental analysis"
			],
			"deprecated": false
		},
		"EPSG:2229": {
			"code": "EPSG:2229",
			"name": "NAD83 / California zone 5",
			"type": "projected",
			"baseCRS": "EPSG:4269",
			"projection": {
				"name": "Lambert Conformal Conic",
				"method": "Lambert Conic Conformal (2SP)",
				"parameters": {
					"latitudeOfOrigin": 33.5,
					"centralMeridian": -118,
					"standardParallel1": 34.03333333,
					"standardParallel2": 35.46666667
				}
			},
			"areaOfUse": {
				"description": "California - Los Angeles, Ventura, San Luis Obispo, Santa Barbara, Kern counties",
				"states": ["California"]
			},
			"accuracy": {
				"horizontal": "Survey-grade within zone",
				"note": "High accuracy within State Plane zone"
			},
			"remarks": "State Plane Coordinate System for southern California including Los Angeles area.",
			"useCases": ["Land surveying", "Engineering projects", "Local government mapping"],
			"deprecated": false
		},
		"EPSG:2263": {
			"code": "EPSG:2263",
			"name": "NAD83 / New York Long Island",
			"type": "projected",
			"baseCRS": "EPSG:4269",
			"projection": {
				"name": "Lambert Conformal Conic",
				"method": "Lambert Conic Conformal (2SP)",
				"parameters": {
					"latitudeOfOrigin": 40.16666667,
					"centralMeridian": -74,
					"standardParallel1": 40.66666667,
					"standardParallel2": 41.03333333
				}
			},
			"areaOfUse": {
				"description": "New York - Long Island, New York City",
				"states": ["New York"]
			},
			"accuracy": {
				"horizontal": "Survey-grade within zone",
				"note": "High accuracy within State Plane zone"
			},
			"remarks": "State Plane Coordinate System for Long Island and New York City area.",
			"useCases": ["Land surveying", "Urban planning", "Infrastructure projects"],
			"deprecated": false
		},
		"EPSG:2277": {
			"code": "EPSG:2277",
			"name": "NAD83 / Texas Central",
			"type": "projected",
			"baseCRS": "EPSG:4269",
			"projection": {
				"name": "Lambert Conformal Conic",
				"method": "Lambert Conic Conformal (2SP)",
				"parameters": {
					"latitudeOfOrigin": 29.66666667,
					"centralMeridian": -100.3333333,
					"standardParallel1": 30.11666667,
					"standardParallel2": 31.88333333
				}
			},
			"areaOfUse": {
				"description": "Texas - central zone including Austin, San Antonio",
				"states": ["Texas"]
			},
			"accuracy": {
				"horizontal": "Survey-grade within zone",
				"note": "High accuracy within State Plane zone"
			},
			"remarks": "State Plane Coordinate System for central Texas including Austin and San Antonio areas.",
			"useCases": ["Land surveying", "Transportation planning", "Utility mapping"],
			"deprecated": false
		},
		"EPSG:2236": {
			"code": "EPSG:2236",
			"name": "NAD83 / Florida East",
			"type": "projected",
			"baseCRS": "EPSG:4269",
			"projection": {
				"name": "Transverse Mercator",
				"method": "Transverse Mercator",
				"parameters": {
					"latitudeOfOrigin": 24.33333333,
					"centralMeridian": -81,
					"scaleFactor": 0.999941177
				}
			},
			"areaOfUse": {
				"description": "Florida - east of approximately 82°W including Miami, Jacksonville",
				"states": ["Florida"]
			},
			"accuracy": {
				"horizontal": "Survey-grade within zone",
				"note": "High accuracy within State Plane zone"
			},
			"remarks": "State Plane Coordinate System for eastern Florida including Miami and Jacksonville.",
			"useCases": ["Land surveying", "Coastal mapping", "Urban development"],
			"deprecated": false
		},
		"EPSG:2285": {
			"code": "EPSG:2285",
			"name": "NAD83 / Washington North",
			"type": "projected",
			"baseCRS": "EPSG:4269",
			"projection": {
				"name": "Lambert Conformal Conic",
				"method": "Lambert Conic Conformal (2SP)",
				"parameters": {
					"latitudeOfOrigin": 47,
					"centralMeridian": -120.8333333,
					"standardParallel1": 47.5,
					"standardParallel2": 48.73333333
				}
			},
			"areaOfUse": {
				"description": "Washington - north of approximately 47.5°N including Seattle",
				"states": ["Washington"]
			},
			"accuracy": {
				"horizontal": "Survey-grade within zone",
				"note": "High accuracy within State Plane zone"
			},
			"remarks": "State Plane Coordinate System for northern Washington including Seattle area.",
			"useCases": ["Land surveying", "Urban planning", "Environmental mapping"],
			"deprecated": false
		}
	},
	"zoneMapping": {
		"Alabama": { "zone": "East", "code": "EPSG:26929", "name": "NAD83 / Alabama East" },
		"Alaska": {
			"zone": "Zone 4",
			"code": "EPSG:26934",
			"name": "NAD83 / Alaska zone 4",
			"notes": "Multiple zones (1-10)"
		},
		"Arizona": { "zone": "Central", "code": "EPSG:26949", "name": "NAD83 / Arizona Central" },
		"Arkansas": { "zone": "North", "code": "EPSG:26951", "name": "NAD83 / Arkansas North" },
		"California": {
			"zone": "Zone 5",
			"code": "EPSG:2229",
			"name": "NAD83 / California zone 5",
			"notes": "Multiple zones (1-6)"
		},
		"Colorado": { "zone": "Central", "code": "EPSG:26954", "name": "NAD83 / Colorado Central" },
		"Connecticut": { "zone": "Statewide", "code": "EPSG:26956", "name": "NAD83 / Connecticut" },
		"Delaware": { "zone": "Statewide", "code": "EPSG:26957", "name": "NAD83 / Delaware" },
		"District of Columbia": {
			"zone": "Maryland",
			"code": "EPSG:26985",
			"name": "NAD83 / Maryland"
		},
		"Florida": {
			"zone": "East",
			"code": "EPSG:2236",
			"name": "NAD83 / Florida East",
			"notes": "Multiple zones (East, West, North)"
		},
		"Georgia": { "zone": "East", "code": "EPSG:26966", "name": "NAD83 / Georgia East" },
		"Hawaii": { "zone": "Zone 3", "code": "EPSG:26963", "name": "NAD83 / Hawaii zone 3" },
		"Idaho": { "zone": "Central", "code": "EPSG:26969", "name": "NAD83 / Idaho Central" },
		"Illinois": { "zone": "East", "code": "EPSG:26971", "name": "NAD83 / Illinois East" },
		"Indiana": { "zone": "East", "code": "EPSG:26973", "name": "NAD83 / Indiana East" },
		"Iowa": { "zone": "North", "code": "EPSG:26975", "name": "NAD83 / Iowa North" },
		"Kansas": { "zone": "North", "code": "EPSG:26977", "name": "NAD83 / Kansas North" },
		"Kentucky": { "zone": "North", "code": "EPSG:2205", "name": "NAD83 / Kentucky North" },
		"Louisiana": { "zone": "South", "code": "EPSG:26982", "name": "NAD83 / Louisiana South" },
		"Maine": { "zone": "East", "code": "EPSG:26983", "name": "NAD83 / Maine East" },
		"Maryland": { "zone": "Statewide", "code": "EPSG:26985", "name": "NAD83 / Maryland" },
		"Massachusetts": {
			"zone": "Mainland",
			"code": "EPSG:26986",
			"name": "NAD83 / Massachusetts Mainland"
		},
		"Michigan": { "zone": "South", "code": "EPSG:26989", "name": "NAD83 / Michigan South" },
		"Minnesota": { "zone": "Central", "code": "EPSG:26992", "name": "NAD83 / Minnesota Central" },
		"Mississippi": { "zone": "East", "code": "EPSG:26994", "name": "NAD83 / Mississippi East" },
		"Missouri": { "zone": "Central", "code": "EPSG:26997", "name": "NAD83 / Missouri Central" },
		"Montana": { "zone": "Statewide", "code": "EPSG:32100", "name": "NAD83 / Montana" },
		"Nebraska": { "zone": "Statewide", "code": "EPSG:32104", "name": "NAD83 / Nebraska" },
		"Nevada": { "zone": "Central", "code": "EPSG:32108", "name": "NAD83 / Nevada Central" },
		"New Hampshire": { "zone": "Statewide", "code": "EPSG:32110", "name": "NAD83 / New Hampshire" },
		"New Jersey": { "zone": "Statewide", "code": "EPSG:32111", "name": "NAD83 / New Jersey" },
		"New Mexico": { "zone": "Central", "code": "EPSG:32113", "name": "NAD83 / New Mexico Central" },
		"New York": {
			"zone": "Long Island",
			"code": "EPSG:2263",
			"name": "NAD83 / New York Long Island",
			"notes": "Multiple zones"
		},
		"North Carolina": {
			"zone": "Statewide",
			"code": "EPSG:32119",
			"name": "NAD83 / North Carolina"
		},
		"North Dakota": { "zone": "South", "code": "EPSG:32121", "name": "NAD83 / North Dakota South" },
		"Ohio": { "zone": "South", "code": "EPSG:32123", "name": "NAD83 / Ohio South" },
		"Oklahoma": { "zone": "North", "code": "EPSG:32124", "name": "NAD83 / Oklahoma North" },
		"Oregon": { "zone": "North", "code": "EPSG:32126", "name": "NAD83 / Oregon North" },
		"Pennsylvania": { "zone": "South", "code": "EPSG:32129", "name": "NAD83 / Pennsylvania South" },
		"Rhode Island": { "zone": "Statewide", "code": "EPSG:32130", "name": "NAD83 / Rhode Island" },
		"South Carolina": {
			"zone": "Statewide",
			"code": "EPSG:32133",
			"name": "NAD83 / South Carolina"
		},
		"South Dakota": { "zone": "South", "code": "EPSG:32135", "name": "NAD83 / South Dakota South" },
		"Tennessee": { "zone": "Statewide", "code": "EPSG:32136", "name": "NAD83 / Tennessee" },
		"Texas": {
			"zone": "Central",
			"code": "EPSG:2277",
			"name": "NAD83 / Texas Central",
			"notes": "Multiple zones (N/NC/C/SC/S)"
		},
		"Utah": { "zone": "Central", "code": "EPSG:32143", "name": "NAD83 / Utah Central" },
		"Vermont": { "zone": "Statewide", "code": "EPSG:32145", "name": "NAD83 / Vermont" },
		"Virginia": { "zone": "South", "code": "EPSG:32147", "name": "NAD83 / Virginia South" },
		"Washington": {
			"zone": "North",
			"code": "EPSG:2285",
			"name": "NAD83 / Washington North",
			"notes": "Multiple zones (North, South)"
		},
		"West Virginia": {
			"zone": "South",
			"code": "EPSG:32150",
			"name": "NAD83 / West Virginia South"
		},
		"Wisconsin": { "zone": "Central", "code": "EPSG:32153", "name": "NAD83 / Wisconsin Central" },
		"Wyoming": {
			"zone": "West Central",
			"code": "EPSG:32158",
			"name": "NAD83 / Wyoming West Central"
		}
	}
}