\contentsline {section}{\numberline {1}Introduction}{1}{section.1}
\contentsline {section}{\numberline {2}Spatial points}{2}{section.2}
\contentsline {section}{\numberline {3}Grids}{4}{section.3}
\contentsline {section}{\numberline {4}Lines}{4}{section.4}
\contentsline {subsection}{\numberline {4.1}Building line objects from scratch}{4}{subsection.4.1}
\contentsline {subsection}{\numberline {4.2}Building line objects with attributes}{6}{subsection.4.2}
\contentsline {section}{\numberline {5}Polygons}{6}{section.5}
\contentsline {subsection}{\numberline {5.1}Building from scratch}{6}{subsection.5.1}
\contentsline {subsection}{\numberline {5.2}Polygons with attributes}{7}{subsection.5.2}
