DDR Changes

DDR Change Information

General Information
DWG/DXF Output
Planimetrics Information
Property Information
Aerial Photography Information
LiDAR Information
Utility Information
Other Information
Feature Codes

General Information

  • Listed below is helpful information and recent/upcoming changes of which you should be aware.

DWG/DXF Output

  • 12/8/2015 - Enhanced DWG output by providing an additional DWG file that has all requested data merged into a single file (named by request ID). Individual files are also still provided for each data type (i.e. Property, Planimetrics, etc.).

  • 5/27/2014 - Updated the format to Autocad Release 2010.

Planimetrics Information

  • 6/1/2015 - Buildings, pavement edge, and water features were updated "on-screen" from spring 2014 orthophotography.

  • 2/18/2014 - The 2009 FEMA FIRM floodplain information has been phased out of the files in favor of the National Floodplain Hazard Layer (NFHL) FEMA data. The new NFHL layers have been added. The 2009 Firm layers will be removed from the process after 4 months 6/18/2014. Please update any processes you may have pointing at the 2009 FIRM data.

  • Buildings are updated "on-screen" from current orthophotography.  New buildings captured in this manner have the potential of being less spatially accurate than those captured previously (in 2000) since they were not captured in stereo viewing.  We trust that the improved currency more than compensates for the potential slight loss in spatial accuracy.

Property Information

  • Attributes now available with the property data include: Property ID, Owner Name & Address (if licensed), Situs Address, Landuse, Legal Description, Tax Unit, Year Built, Dwelling Units, Acres, Sq. Feet, Perimeter, Property Polygon Type, Class.

  • Property annotation has changed to geodatabase annotation. We are experiencing some difficulty getting the annotation to look exactly like it did before. There will be instances where the annotation may not line up exactly as it should. We are trying to minimize this as much as possible, but it will occur.

Aerial Photography Information

  • The source of aerial (and ortho) photography is now a single seamless countywide image for each flight date. This allows clipping by any specified extent. It also means, however, that photography requested by section or quarter section will not extend outside of the section or quarter section (previously 100-200 feet outside of the section were included in each section tile). If this area is desired as output then the "select by map" option should be utilized.

  • Output images will always be rectangular, even if the specified extent was non-rectangular. The clipping is done by the bounding box of the specified extent.

  • When ordering by quarter section, a full square mile of imagery is no longer delivered (nor do you have to pay for the full square mile). However, you will receive a separate image for each quarter section ordered even if they are in the same section.

  • Historical imagery is now available. You are required to order the current year imagery, but then you are offered multiple years of historic imagery that AIMS has captured.

  • The format choices available for imagery are TIF and Mr SID. The Mr SID format is compressed so the file size should be quite a bit smaller, but the quality of the image may be slightly reduced.

  • Color orthophotography was acquired in the last flight of imagery. Color imagery increases the file size over Black and White about threefold because of the extra bands. AIMS has also resampled the color imagery to grayscale. This will allow you to continue ordering the smaller file size grayscale images if you wish.

Surface/LiDAR Information

  • 7/10/2012 - Updated LiDAR data is now available and can be selected under the planimetric data selection (flown in December 2011). LiDAR stands for LIght Detection And Ranging and is an efficient way to capture elevation data across a wide area. The resulting data is a series of points with an elevation.

    In order to request the LiDAR data you must first choose planimetrics. There will be no additional charge; the cost is included in the cost to purchase planimetrics. When requested, the data is delivered in 3 formats: XYZ (which are comma separated value files - CSV), LAS, and DTM (Tiff). The export of whole tiles is no longer necessary. The resulting surface files now come as a single merged file and are clipped to the area of interest. Due to the increased density of the LiDAR point data breakline data is less dense and is represented by a polygon that can be used as a "hard replace" on the LiDAR data.

    Updated contour data is also available based on the LiDAR. Obscure and depression ontours are no longer identified in the 2012 data for symbology purposes.

    For more information regarding the LiDAR data, visit the LiDAR Information Page.

Utility Information

  • Utility data is now available for partners licensing the utility information.  This feature is limited to the cities, utility companies, and sub contractors that are a part of the Collaborative Utility Exchange (CUE).


  • CIP data is now available for partners licensing the utility information. CIP data is collected from city and county organizations and utilities and combined to create a comprehensive dataset. The nature of CIP data is that it is subject to change quickly and frequently. Some projects on the list may be cancelled or delayed several years, while other more urgent projects will begin construction without ever appearing on the CIP list. The data is intended as a planning tool to help coordinate timing of infrastructure upgrades/replacement to save valuable resources and preserve existing infrastructure. Care should be taken to contact the project owner to discuss details. Initial data was captured from feature classes, websites, and written documents. AIMS is heavily dependent upon cities/utilities to provide updates to the data.

Other Information

  • Attributes now available with the plat data include: Plat ID, Plat Name, Plat Number, Book, Page, Qtr. Section ID, Area Sq. Ft., City ID, Date Recorded, Year Recorded, Instrument, Instrument Desc., Number of Units, Perimeter in Ft.

  • Attributes now available with the subdivision data include: Subdivision: Subdivision Name, Subdivision Type.

  • Attributes now available with the centerline data include: Date Added, From Elevation, To Elevation, Left Address From, Left Address To, Miles, Minutes, One-way, Right Address From, Right Address To, Road Name, Speed Limit, Street Class, Street Status, Street Name, Street Type, Subclass, Suffix Direction.

Feature Codes

  • Most data includes coded values that represent a more descriptive value in another table.  We refer to these as feature code tables.  The descriptions for these lookup values can be found by referencing the AIMS Feature Code tables webpage.

For more information, contact AIMS