Sanborn Mapping Company, Inc September 2007 vector digital data LakeTiles Provide high density LiDAR elevation data map of LCRA Lakes region, TX. Provide Bare Earth DEM (vegetation removal) of LCRA Lakes region, TX. This LIDAR operation was designed to provide a high density set of masspoints within the defined areas. The data sets are suitable for the development of contours for use in hydraulic/hydrologic model development, and for assessing environmental impacts.Typical uses for the data set include: FEMA Flood Plain Map Modernization. DFIRM map updates. Watersheds and other hydro studies per FEMA specifications. County Mapping projects which include several uses, in addition to Flood mitigation assessment. Mapping projects that include accuracy verification, reporting and meta data. en September 2007 publication date Complete None planned -98.503676-97.80448531.03179530.310467 547717.742993 614102.588613 3353784.813773 3433232.937582 Place_Keyword: TX Theme_Keyword: Theme_Keyword_Thesaurus: Keywords Theme_Keyword: Theme_Keyword: DEM Theme_Keyword: Theme_Keyword: Digital elevation model Theme_Keyword: Theme_Keyword: Elevation Theme_Keyword: Theme_Keyword: Digital terrain model Theme_Keyword: Theme_Keyword: Surface Model Theme_Keyword: Theme_Keyword: Hydraulic Theme_Keyword: Theme_Keyword: Hydrographic Theme_Keyword: Theme_Keyword: Lidar Theme_Keyword: Theme_Keyword: LIDAR Theme_Keyword: Theme_Keyword: Hydrologic Modeling Theme_Keyword: Theme_Keyword: Drainage Area Theme_Keyword: Theme_Keyword: Hydrology Theme_Keyword: Theme Keyword: LCRA Lakes region Theme_Keyword_Thesaurus: Place_Keyword: TX Place_Keyword: Texas Place_Keyword: LCRA Lakes region Theme_Keyword_Thesaurus: Place_Keyword: Texas None None LiDAR Manager mailing and physical address

1935 Jamboree Drive #100

Colorado Springs Colorado 80920 United States 719.264.5602 N/A 719.264.5637 jyoung@sanborn.com Sanborn MappingJamie Young Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350 Unclassified ASCII_(XYZ) Vector G-polygon 157 Simple Polygon FALSE 157 FALSE FALSE coordinate pair 0.000000 0.000000 meters Universal Transverse Mercator140.999600-99.0000000.000000500000.0000000.000000 North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 NAD_1983_UTM_Zone_14N North American Vertical Datum of 1988 meters Explicit elevation coordinate included with horizontal coordinates ASCII Text Files - XYZ (mixed units - feet/meters)LakeTilesFeature Class157FIDFIDOID400Internal feature number.ESRISequential unique whole numbers that are automatically generated.ShapeShapeGeometry000Feature geometry.ESRICoordinates defining the features.FIRST_RTRNFIRST_RTRNString15LAST_RETRNLAST_RETRNString15BARE_EARTHBARE_EARTHString15INTENSITYINTENSITYString15TILENAMETILENAMEString15LASLASString25 Data are organized by tile and are available through several distribution methods. 0.0200.020 Jamie Young Sanborn Mapping LiDAR Manager 719.264.5602 N/A 719.264.5637 jyoung@sanborn.com mailing and physical address

1935 Jamboree Drive #100

Colorado SpringsCO.80920United States TNRIS does not warrant these data for any particular use and is not responsible for any damages resulting from the use of the data. Contact TNRIS for more details. Acknowledgement of TNRIS appreciated in products derived and used from the data. The originator asks to be credited in derived products. 20071009 Jamie Young Sanborn Mapping LiDAR Manager mailing and physical address

1935 Jamboree Drive #100

Colorado Springs Colorado 80920 United States 719-264-5602 N/A 719-264-5637 jyoung@sanborn.com FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 en local time http://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile 20060727 09090400 20060727 20060729 07433200 20060729 20060810 20182900 20060810 20070115 19413000 {798B605E-AEE5-441F-A798-19DB4FD1FA47} 20070109 13584900 FALSE 20070109 13584900 20070115 Data Collection: Using a LH Systems ALS50 Light Detection And Ranging (LiDAR) system, 101 flight lines of standard density (1.4 meter ground sample distance) data were collected over areas in LCRA Lakes region,TX (approximately 487 square miles). Multiple returns were recorded for each laser pulse along with an intensity value for each return. The data acquisition occurred in 5 missions between December 31, 2006 , and January 07, 2007. During the LIDAR campaign, the Sanborn field crew conducted a GPS field survey to establish final coordinates of the ground base stations for final processing of the base-remote GPS solutions.2007080308251200September 2007Airborne GPS Processing: Airborne GPS data was differentially processed and integrated with the post processed IMU data to derive a smoothed best estimate of trajectory (SBET). The SBET was used to reduce the LiDAR slant range measurements to a raw reflective surface for each flight line. The overlap between flight lines was removed to provide a homogeneous coverage, and the coverage was classified to extract a bare earth digital elevation model (DEM). Airborne GPS is differentially processed using the GrafNAV V7.50 software by Waypoint Consulting of Calgary, Alberta, Canada. The PDOP and distance separation is as follows: IMU data is processed using the PosPac V4.2 software by Applanix Corporation of Richmond Hill, Ontario, Canada. The reflective surface is derived using the ALS Post Processor software by Leica Geosystems GIS & Mapping Division of Atlanta, Georgia. The classification and quality control (QC) of LiDAR data is carried out using TerraScan software by Terrasolid Limited of Helinski, Finland.September 2007IMU data Processing: IMU data provides information concerning roll, pitch and yaw of collection platform during collection event. IMU information allows the pulse vector to be properly placed in 3D space allowing the distance from the aircraft reference point to be properly positioned on the elevation model surface. IMU data is processed using the PosPac V4.2 software by Applanix Corporation of Richmond Hill, Ontario, Canada.September 2007Reflective Surface Generation: The reflective surface is derived using the ALS Post Processor software by Leica Geosystems GIS & Mapping Division of Atlanta, Georgia.September 2007LIDAR Point Classification The classification and quality control (QC) of LiDAR data is carried out using TerraScan software by Terrasolid Limited of Helinski, Finland.September 2007Output LAS Files The product output of LiDAR data is carried out using TerraScan software by Terrasolid Limited of Helinski, Finland. LAS Binary, ascii xyz, and intensity images were created. The USGS DEM product was created by exporting ArcINFO ascii grid format from Terrascan and further processing was performed with ArcGIS. Note: For the USGS DEM format, the DEM code has been set to "1". Originally, the code was to be set to "4", but this caused import problems.September 2007 NoneNoneFEMA LiDAR SpecificationsFEMA LiDAR Specifications; +/- 18 cm Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 XXXXX_Boundary 360707.40384 419627.261735 3340336.930302 3270843.78419 1 -94.446866 -93.829718 30.191834 29.559549 1 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset NAD_1983_UTM_Zone_15N 1 20071009100043002007092715351900FALSE2007092715335500{D471C19A-DCFF-48E9-9233-0163B2CFDE96}20071009Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350LakeTiles547717.742993614102.5886133433232.9375823353784.8137731-98.503676-97.80448531.03179530.3104671ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002Local Area Network0.020ShapefileNAD_1983_UTM_Zone_14N157