ProximityOne Digital Map Database
The ProximityOne Digital Map Database (DMD) is comprised of point, line and area shapefiles and related datasets covering the United States. DMD is used to associate virtually any type of subject matter data to the geographic infrastructure down to the address and intersection level of detail. Vector-based geography include:
Points ... address locations, schools, hospitals, other related
Lines ... roads, railroads, water, other related.
Area/polygon ... statistical & political area boundaries, other related
Census Tract/Block Street Index
DMD is updated continuously and covers the United States, Puerto Rico and U.S. territorial areas.
DMD is an extension and update to the Census Bureau TIGER/Line (TLF) shapefiles. Warren Glimpse, founder of ProximityOne, developed the Columbia, MO GBF/DIME file used as the prototype for the TLF program and is developer of desktop and Web-based GIS applications/tools (CVXE GIS tools using TLF data integrated with other wide-ranging data).
Augmenting the Census 2010 and more recent vintage TLF, DMD is developed on a TLF base that benefits from the extensive re-working of the TLF data under the LUCA and MAF programs. Use of improved coordination with local street centerline files, E911 data, and address coverage editing the new TLF data are vastly improved relative to previous versions.
Segment Side Geocoding
Having intersection-to-intersection road segments coded with address ranges on both sides of the segment has always been an important feature of the TLF data. Since the geocodes (such as census block) are also coded to both sides of the road segment, the TLF data provide a near unique means of correctly assigning an address to a geocode.
Filling in Gaps; Keeping Current
Even with improvement in the Census 2010 and successor TLFs, there are significant gaps and omissions. DMD improves the TLF by updating and completing key missing or incorrect data values (address ranges, ZIP codes, other) in a manner that enables a cross-walk back to the original TLF record.
Similarly, Census TLFs are obsolete in many respects by the time they becomes available for public use. Newer road segments have already been added; others removed; others have had attributes change in value. DMD improves the TLF by updating and completing segments in a manner that enables a cross-walk back to the original TLF record.
Unique Shapefiles Reflecting Today's Geography
As certain geographies change, such as school districts, DMD is updated with a cross-walk back to the original TLF record. Point-oriented data that are missing or incorrectly coded, such as schools, are updated. Other geographic lines/points/polygons, not available from Census, are developed using DMD. These areas include ZIP Code Area (ZCAs), School Attendance Zones (SAZs) and Census 2000-like urban areas.
- Major Roads
- Detail Roads
- Public Schools
- Private Schools
ProximityOne User Group
Join the ProximityOne User Group to keep up-to-date with new developments relating to metros and component geography decision-making information resources. Receive updates and access to tools and resources available only to members. Use this form to join the User Group.
Support Using these Resources
Learn more about accessing and using demographic-economic data and related analytical tools. Join us in a Data Analytics Lab session. There is no fee for these one-hour Web sessions. Each informal session is focused on a specific topic. The open structure also provides for Q&A and discussion of application issues of interest to participants.
ProximityOne develops geodemographic-economic data and analytical tools and helps organizations knit together and use diverse data in a decision-making and analytical framework. We develop custom demographic/economic estimates and projections, develop geographic and geocoded address files, and assist with impact and geospatial analyses. Wide-ranging organizations use our tools (software, data, methodologies) to analyze their own data integrated with other data. Follow ProximityOne on Twitter at www.twitter.com/proximityone. Contact us (888-364-7656) with questions about data covered in this section or to discuss custom estimates, projections or analyses for your areas of interest.