Service Description: Alberta Survey Control Markers
Service ItemId: 351538e598da4761b8d3b90dea210505
Has Versioned Data: false
Max Record Count: 1000
Supported query Formats: JSON
Supports applyEdits with GlobalIds: False
Supports Shared Templates: True
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Description: Includes both urban (former MISAM) and rural (former non-MISAM) control markers that make up the NAD83 (CSRS) ASCM subset. Listing produced 2009/04/02.All ASCMs in this dataset are within the first horizontal order.Horizontal order of ASCMs: based on the dimension of a 95 percent relative confidence ellipse’s semi-major axis, as outlined in the Specifications and Recommendations for Control Surveys and Survey Markers (1978) by NRCAN. For classification, this dimension (in cm) must not exceed C*(d + 0.20), where d is the distance to the adjacent marker in km, and C is the factor associated with the order class (see the following value-set). - 1: first order. Dimension is not greater than 2*(d + 0.2). - 2: second order. Dimension is not greater than 5* (d + 0.2). - 3: third order. Dimension is not greater than 12*(d + 02). - 4: fourth order. Dimension is not grater than 30* (d + 0.2). - U: unclassified. Either the dimension exceeds 30* (d + 0.2), an ordercannot be determined (no covariance data exists), or order isirrelevant (the marker was destroyed before the coordinates wereadopted).
Copyright Text: Alberta Environment and Parks - Geodetic Control Unit
Spatial Reference: 3779 (3779)
Initial Extent:
XMin: -213871.966215072
YMin: 5660531.02700995
XMax: -209268.207007553
YMax: 5663960.03386796
Spatial Reference: 3779 (3779)
Full Extent:
XMin: -358435.052482854
YMin: 5431713.30186087
XMax: -35266.7175719167
YMax: 6566261.52419179
Spatial Reference: 3779 (3779)
Units: esriMeters
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