Partnerships   OP works closely with the Office of the Chief Technology Officer (OCTO), which has provided long-term support to help build and grow the GIS capabilities within the Office of Planning. OCTO has developed interactive mapping tools including the DC Guide. We have been pleased to contribute to that effort, and our high-quality cartographic products complement those online tools.   OP staff at all levels continue to work closely with their counterparts at National Capital Planning Commission (NCPC), our sister organization within the federal government.   Demographic information from the Census Bureau and other sources are key to understanding the various places in DC. We work hand-in-hand with the staff of the State Data Center (SDC), part of the Long Range Planning Division, to help make that information available to everyone.   The mission of the State Data Center (SDC) is to provide easy and efficient access to US Census Bureau data through a network of affiliate agencies in the District. The DC Public Library is an affiliate charged with providing historical census information in hard copy and electronic formats.   Our principal technology partner is Environmental Systems Resources Institute (ESRI). They make the baseline GIS software that we rely on, including ArcView GIS, SDE, and ArcIMS.   The District of Columbia Government has also licensed an archive of detailed oblique aerial images of DC from Pictometry International. Our license allows us to use those images in our products. Others outside of DC government may wish to contact them directly to license individual images for their own purposes.