DDR Change Information

General Information

• Listed below is helpful information and recent/upcoming changes you should be aware.
  
  
• 4/14/2008 - The attributes for the features are now being exported out as “Object Data Tables” embedded in the file. The change should be transparent to end users and should not require any addtional actions. This change will help decrease the file size and increase draw time of the file at the same time providing AutoCAD users with important attribute data.
  
  
• 3/06/2008 - Added owner name and owner address to property attributes. This data is only available to data licensees.

DWG/DXF Output

• 4/14/2008 - The attributes for the features are now being exported out as “Object Data Tables” embedded in the file. The change should be transparent to end users and should not require any addtional actions. This change will help decrease the file size and increase draw time of the file at the same time providing AutoCAD users with important attribute data.
  
  
• 4/14/2008 - Points are no longer created as blocks but are still enhanced for better display. This change will help in decreasing the file size and improving the draw times.
  
  
• 1/2007 - Updated the format to Autocad Release 2004.
  
  
• Selected attributes of features are now available in DWG & DXF files. To receive this information, check the box entitled "Include Attributes as Block Attributes" found at the top of the "Select Data" Screen in DDR. A list of attributes that are included are in the appropriate section below.
  

Planimetrics Information

• Attributes now available with the planimetric data include: Date Added, Feature Code, Feature Code Description, Photo Date, Source Accuracy, Last Updated.
  
  
• Attributes now available with the contour data include: Elevation, Feature Code, Photo Date, Source Accuracy, Last Updated.
  
  
• Buildings were updated "on-screen" from 2005 orthophotography.  New buildings captured in this manner have the potential of being less spatially accurate than those captured previously 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.
  
  
• The contents of the static "cent" file have been replaced with the countywide street centerline dataset that is updated weekly by AIMS and the Emergency Communications Center (ECC).  The subclass field is used to derive layers based on the street type.  For more information on this dataset click here.
  

Property Information

• 3/06/2008 - Added owner name and owner address to property attributes. This data is only available to data licensees.
  
• 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

• 2/14/2007 - Lidar data flown in the spring of 2006 is now available as an additional data option. 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. The Lidar data will be exported in .xyz files which are comma separated value files (CSV). There will be separate files based on the classification of the data.
  
  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).

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

• Tel: 913-715-1600 (M-F, 8-5)
• Email: mapper@jocogov.org