Thought I would share a few things I recently learned about coordinates when using Zend Framework‘s Zend Pdf library.

• The typographical point is the unit of measurement used for all coordinates. 72 points equals 1 inch. An 8.5″ * 11″ page is 612 * 792 points.
• The x/y coordinate origin is the bottom left corner of the page. If you are laying out a page from top to bottom, the y-coordinate will get smaller as you work your way down the page.
• Lines are centered on their coordinates. Continue reading →