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Urban Start-up Agglomeration and Venture Capital Investment (view source)
Revision as of 11:51, 26 September 2017
, 11:51, 26 September 2017→GIS Resources
'''ST_Buffer(geography, float8)''' returns geography [1]
'''ST_Intersection(geography, geography)''' returns geography [1]
===Functions for Linear Referencing===
'''ST_LineInterpolatePoint(geometry A, double measure)''': Returns a point interpolated along a line.
'''ST_LineLocatePoint(geometry A, geometry B)''': Returns a float between 0 and 1 representing the location of the closest point on LineString to the given Point.
'''ST_Line_Substring(geometry A, double from, double to)''': Return a linestring being a substring of the input one starting and ending at the given fractions of total 2d length.
'''ST_Locate_Along_Measure(geometry A, double measure)''': Return a derived geometry collection value with elements that match the specified measure.
'''ST_Locate_Between_Measures(geometry A, double from, double to)''': Return a derived geometry collection value with elements that match the specified range of measures inclusively.
'''ST_AddMeasure(geometry A, double from, double to)''': Return a derived geometry with measure elements linearly interpolated between the start and end points. If the geometry has no measure dimension, one is added.
===3-D Functions===
'''ST_3DClosestPoint''' — Returns the 3-dimensional point on g1 that is closest to g2. This is the first point of the 3D shortest line.
'''ST_3DDistance''' — For geometry type Returns the 3-dimensional cartesian minimum distance (based on spatial ref) between two geometries in projected units.
'''ST_3DDWithin''' — For 3d (z) geometry type Returns true if two geometries 3d distance is within number of units.
'''ST_3DDFullyWithin''' — Returns true if all of the 3D geometries are within the specified distance of one another.
'''ST_3DIntersects''' — Returns TRUE if the Geometries “spatially intersect” in 3d - only for points and linestrings
'''ST_3DLongestLine''' — Returns the 3-dimensional longest line between two geometries
'''ST_3DMaxDistance''' — For geometry type Returns the 3-dimensional cartesian maximum distance (based on spatial ref) between two geometries in projected units.
'''ST_3DShortestLine''' — Returns the 3-dimensional shortest line between two geometries
===Relevant PostgreSQL Commands===
'''\dt *.*''' Show all tables
'''\q''' Exit table
===Specifities/ Outliers to consider===
New York (decompose)
Princeton area (keep Princeton unique)
Reston, Virginia (keep)
San Diego (include La Jolla)
Silicon Valley (all distinct)
