Teradata Package for Python Function Reference | 17.10 - envelope - Teradata Package for Python - Look here for syntax, methods and examples for the functions included in the Teradata Package for Python.
Teradata® Package for Python Function Reference
- Product
- Teradata Package for Python
- Release Number
- 17.10
- Published
- April 2022
- Language
- English (United States)
- Last Update
- 2022-08-19
- lifecycle
- previous
- Product Category
- Teradata Vantage
- teradataml.geospatial.geodataframecolumn.GeoDataFrameColumn.envelope = envelope(self)
- DESCRIPTION:
Returns the bounding rectangle for the Geometry value.
PARAMETERS:
None
SUPPORTED GEOMETRY TYPES:
All Geometry types.
Note:
This method can be called on 3D geometries (those that include Z
coordinates). However, the Z coordinate is dropped, and only x and y
coordinates are returned.
RAISES:
TypeError, ValueError, TeradataMlException
RETURNS:
GeoDataFrameColumn containing Geometry values
EXAMPLES:
from teradataml import GeoDataFrame, load_example_data
from teradataml import Point, LineString, Polygon, GeometryCollection
# Load example data.
load_example_data("geodataframe", "sample_shapes")
# Create a GeoDataFrame.
geodf = GeoDataFrame("sample_shapes")
print(geodf)
# Example 1: Get the bounding rectangle for (ST_Point/ST_MultiPoint) geometries in column
# 'points'.
points_lines = geodf.select(["skey", "points", "linestrings"])
ep_expr = points_lines.geometry.envelope()
points_lines.assign(res = ep_expr)
# Example 2: Get the bounding rectangle for (ST_Linestring/ST_MultiLinestring) geometries in column
# 'linestrings'.
ep_expr = points_lines.linestrings.envelope()
points_lines.assign(res = ep_expr)
# Example 3: Filter the rows where the bounding rectangle for (ST_Point/ST_MultiPoint)
# geometries in column 'points' is same as the specified Polygon GeometryType
# object.
# Create an object of Polygon GeometryType.
po1 = Polygon([(1, 1), (20, 1), (20, 5), (1, 5), (1, 1)])
points_lines[points_lines.points.envelope() == po1]