Please, see "database" directory for image SQL files.

png_classic directory contains older Zabbix network map images in PNG format,
 used in Zabbix versions 1.1 - 1.8.

png_modern contains current Zabbix network map images in PNG format.

In addition to using pre-generated SQL files you may also generate an XML file
 to import additional iconsets with png_to_xml.sh script.

strip_inkscape_attributes.xslt may be used to remove inkscape-specific
 attributes from SVG files:
 xsltproc strip_inkscape_attributes.xslt file.svg