geomagic design x tutorial alt 1 worksheet

#Geomagic design x tutorial alt 1 worksheet how to#
#Geomagic design x tutorial alt 1 worksheet manual#

Relationships between geometric objects – contains, intersects, overlaps, The spatial data model is accompanied by a group of natural language Of geometric objects that will be discussed in following sections of thisįor more illustrations of this data model. The standard data model has additional constraints specific to certain types A Y-shaped line feature, forĮxample, is well modeled as a whole by a MultiLineString. These collections aren’t computationally significant, butĪre useful for modeling certain kinds of features. All rounded patches must be approximated byĬollections of points are implemented by a MultiPoint class, collections ofĬurves by a MultiLineString class, and collections of surfaces by a All curves must beĪpproximated by linear splines. LinearRing classes and surface by a Polygon class. The point type is implemented by a Point class curve by the LineString and “gotchas”, for different classes will be discussed later in this manual.

#Geomagic design x tutorial alt 1 worksheet manual#

Spatial predicates, and it’s as deep into theory as this manual will go.Ĭonsequences of point-set theory, including some that manifest themselves as That may seem a bit esoteric, but will help clarify the meanings of Shapely’s Surface has a topological dimension of 2.

Points including those within holes that might exist in the surface. Set consisting of one or more Curves, and an exterior set of all other Within (imagine a Curve dragged in space to cover an area), a boundary A Point hasĪ Curve has an interior set consisting of the infinitely many pointsĪlong its length (imagine a Point dragged in space), a boundary setĬonsisting of its two end points, and an exterior set of all other points.Ī Curve has a topological dimension of 1.Ī Surface has an interior set consisting of the infinitely many points The interior, boundary, and exterior sets of aįeature are mutually exclusive and their union coincides with the entire planeĪ Point has an interior set of exactly one point, a boundary set ofĮxactly no points, and an exterior set of all other points. Each is associated with three sets of (possibly infinite) The fundamental types of geometric objects implemented by Shapely are points,Ĭurves, and surfaces. Tool for your computational geometry job, Shapely might be for you. Thing well, and agree that a spatially enabled RDBMS is often enough the wrong If you enjoy and profit from idiomatic Python, appreciate packages that do one The GEOS library is derived from JTS, a Java project) idioms. The third premise is that Python idioms trump GIS (or Java, in this case, since Multitude of State Plane projections, and Shapely doesn’t burden you with them. You may not need a hundred GIS format readers and writers or the Serialization, and map projection of features are significant, but orthogonal The second premise is that the persistence, Manage (the “M” in “RDBMS”) the data over time in the database we’re using the We can load data into a spatial RDBMS to do work, but if there’s no mandate to Geographic data originate or reside in a RDBMS or are best processed using SQL. Perform PostGIS type geometry operations outside of an RDBMS. The first premise of Shapely is that Python programmers should be able to

Useful to programmers working on non-conventional problems. The geographic information systems (GIS) world, but aspires to be equally Shapely is thereby deeply rooted in the conventions of Specification 1 and Shapely adheres mainly to the same set of standardĬlasses and operations. Guided by the Open Geospatial Consortium’s Simple Features Access Topology Suite (JTS), is the geometry engine of the PostGIS spatialĮxtension for the PostgreSQL RDBMS. Well known and widely deployed GEOS library. Planar features using (via Python’s ctypes module) functions from the Shapely is a Python package for set-theoretic analysis and manipulation of Questions addressable using non-statistical spatial analysis, and more Identified zones of location based spam? These are just a few of the possible Of animal habitat? Which properties in this town intersect with the 50-yearįlood contour from this new flooding model? What are the extents of findspotsįor ancient ceramic wares with maker’s marks “A” and “B”, and where do theĮxtents overlap? What’s the path from home to office that best skirts What is the surveyed perimeter/area ratio of these patches

#Geomagic design x tutorial alt 1 worksheet how to#

This document explains how to use the Shapely Python package forĭeterministic spatial analysis is an important component of computationalĪpproaches to problems in agriculture, ecology, epidemiology, sociology, and This work is licensed under a Creative Commons Attribution 3.0