Request for Proposals for Topographic Mapping. Issued by: Teton County GIS and Teton County Engineering Teton County, Wyoming

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1 Request for Proposals for Topographic Mapping Issued by: Teton County GIS and Teton County Engineering Teton County, Wyoming Proposals due: 2:00PM MDT July 1, 2015 Proposals may be delivered to: Teton County Engineer 320 S. King St. Jackson, WY (There is no US Postal Service to this address) or ed to: Proposals are not required to be in hard copy form, PDFs are acceptable Lidar RFP Page 1 of 7

2 Introduction Teton County has 5 foot elevation contours referenced to NGVD29 that were photogrammetrically produced in Teton County is in the process of adopting revised FEMA Flood Insurance Rate Maps (FIRMs) referenced to NAVD88. The FEMA mapping covers primarily the flood prone areas. Teton County would like to expand this mapping to cover all privately owned land within the County by adding new mapping and merging it with the existing FEMA data. Teton County Wyoming requests proposal for new digital topographic mapping referenced to NAVD88 and incorporation of that data with the existing digital topographic data used by FEMA for the production of the revised FIRMs. Light Detection and Ranging (Lidar) technology was used to compile the FEMA data and the County requests a cost proposal for utilizing and collecting Lidar to meet the needs of this topographic mapping requested. Approximately 115 square miles of new Lidar data will have to be acquired and approximately another 115 square miles of existing raw Lidar data will need to be processed and merged. The project area is generally Western Wyoming, Teton County, Jackson Hole, and bounded approximately north, south, east, west by: 43º 50' N, 43º 13' N, 110º 17' W, 111º 03' W and further defined in shapefiles and KML files which can be downloaded from: tetonwy.greenwoodmap.com/rfp2015/topomappingarea.zip The KML and shapefiles show the perimeter of both the existing raw Lidar data and the areas where new mapping needs to be done. The final deliverables must seamlessly cover the existing Lidar + new Lidar area. Refer to the included README file for more information. Lidar data, and derivative products produced in compliance with this project are based on the U.S. Geological Survey National Geospatial Program LiDAR Base Specification Version 1.0, This specification may be viewed at These LiDAR specifications are required baseline specifications. In addition to the Specification Requirements, this project shall meet the standards for the National Enhanced Elevation Assessment (NEEA) quality level (QL2). Ground Control The County has an existing control network shown in the KMZ and shapefiles above. The County will contract with a local surveying firm to target existing control points and 2015 Lidar RFP Page 2 of 7

3 provide any additional ground control that may be required. Proposals must include detailed control requirements so that the County can evaluate the control costs associated each with proposal. The proposal must identify how many of the County's existing control points will need to be targeted, how many new ground control points will have to be placed, and the required target size. The County horizontal control system is the Wyoming State Plane Coordinate System, West Zone, NAD83/86, in U.S. Survey Feet for the Jackson Hole and Buffalo Valley areas. The County horizontal control system is the Wyoming State Plane Coordinate System, West Zone, NAD83/93 (HARN), in U.S. Survey Feet for the Alta area. The vertical datum for all areas will be NAVD88. Deliverable Products 1. Raw Point Cloud Data Fully compliant LAS v1.3, Point Record Format 1, 3, 4, or 5 LAS v1.3 deliverables with waveform data are to use external auxiliary files with the extension.wdp for the storage of waveform packet data. Georeference information included in all LAS file headers GPS times are to be recorded as Adjusted GPS Time, at a precision sufficient to allow unique timestamps for each return. Intensity values Full swaths, all collected points to be delivered. 1 file per swath, 1 swath per file, file size not to exceed 2GB 2. Classified Point Cloud Fully compliant LAS v1.3, Point Record Format 1, 3, 4, or 5, including File Source ID. LAS v1.3 deliverables with waveform data are to use external auxiliary files with the extension.wdp for the storage of waveform packet data. Specification for additional information. Georeference information included in LAS header column GPS times are to be recorded as Adjusted GPS Time, at a precision sufficient to allow unique timestamps for each return. Intensity values Tiled delivery, without overlap 2015 Lidar RFP Page 3 of 7

4 Classification Scheme (minimum): Code 1 Processed, but unclassified Code 2 Bare-earth ground Code 7 Noise (low or high, manually identified, if needed Code 9 Water Code 10 Ignored Ground (Breakline Proximity) Code 11 Withheld Code 17 Overlap, unclassified Code 18 Overlap-, ground Code 23 Overlap, low point and noise Code 24 Overlap, water Note: Class 7, Noise, is included as a convenience for the data producer. It is not required that all noise be assigned to Class 7. Note: Class 10, Ignored Ground, is for points previously classified as bare-earth but whose proximity to a subsequently added breakline requires that it be excluded during Digital Elevation Model (DEM) generation. 3. Bare Earth Surface (Raster DEM) Cell Size shall be one (1.0) meter, and no less than the design Nominal Pulse Spacing. Delivery in an industry-standard, GIS-compatible, 32-bit floating point raster format e.g. ERDAS.IMG Georeference information shall be included in raster file Tiled delivery in a mutually agreed upon tiling scheme DEM tiles will show no edge artifacts or mismatch Void areas (i.e., areas outside the project boundary but within the tiling scheme) shall be coded using a unique NODATA value. T Vertical Accuracy (RMSE Z ) of the bare earth surface is to be assessed using the methods described in the FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix A, Section A.8.5 paragraph 1, Section A.8.6.1, and Section A (substituting the contracted vertical accuracy requirements (RMSE Z ) for those listed in the FEMA document). Depressions (sinks), natural or man-made, are not to be filled (as in hydroconditioning and hydro-enforcement). Water Bodies (ponds and lakes), wide streams and rivers ( double-line ), and water bodies as defined are to be hydro-flattened within the DEM. Hydroflattening shall be applied to all water impoundments, natural or man-made, that are larger than ~2 acre in area (equivalent to a round pond ~350 in diameter) and 2015 Lidar RFP Page 4 of 7

5 to all streams and rivers that are nominally wider than 100 The methodology used for hydro-flattening is at the discretion of the data producer. 4. Bare Earth Digital Terrain Model (DTM) Breaklines that will produce hydro-enforced / hydro-flattened NSSDA accuracy standards 2 foot contours for 1:2,400-scale maps. Breaklines will allow water to flow from the tops of hills all the way down the stream network. Breaklines will cut through culverts and bridges to allow water to flow downstream network. Elevation values for the breaklines will be derived from the bare-earth Lidar. For streams >2 meters wide, double breaklines will be digitized at the bottom of both sides of the channel at the land/water interface (but not at the top of bank); drainage ditches will be a single line if <2 meters wide; drainage ditches >2 meters wide will be a double line at bottom of channel; and water bodies (ponds, lakes, reservoirs) greater than 1 4 acre in size. The DTM will be of such precision and quality to support projects such as slope analysis; develop perspective plots; perform hydrographic and hydrologic analyses; generate cross- sections; regenerate contours; and other products requiring continuous contours of mapped areas. Elevation data points shall be delivered as either a regular or irregular DTM in an AutoCAD compatible format. 5. Contours Two-foot contours (derived from the elevation data) created from the DTM dataset that are certified to meet or exceed National Map Accuracy Standards for two-foot contours at a scale of 1:2,400 (1 = 200'). These contours will be used for cartographic visualization purposes. Both smoothed and raw contour data sets are requested. Spot elevations for depressions and buildings taller than 3 stories will be included as point data. 6. Metadata: The following Metadata shall be provided Collection Report detailing mission planning and flight logs. Processing Report detailing calibration, classification, and product generation procedures including methodology used for breakline collection and hydroflattening. QA/QC Reports (detailing the analysis, accuracy assessment and validation of: 2015 Lidar RFP Page 5 of 7

6 a. The point data (absolute, within swath, and between swath) b. The bare-earth surface (absolute) c. Other optional deliverables as appropriate Submittal Procedures and Requirements Proposals prepared in response to this solicitation must be received by the County by 2:00PM MDT July 1, 2015 If the proposing firm feels that the scope of services, as described above, may be improved upon by additions, deletions, or changes, those changes should be clearly stated in the submittal. Responding firms must present their qualifications, relevant experience, financial capacity, and staff capabilities. All proposed subcontractors must be identified, and the work proposed to be performed by the subcontractors must be listed. A project specific statement of qualifications must be provided for proposed subcontractors. Cost must not be included in the proposal but must be provided in a separate sealed envelope or separate in the case of a PDF submittal. Proposals must include references for clients for which the responding firm has provided similar professional services within the last three years. Proposals may be delivered to: Teton County Engineer 320 S. King St. Jackson, WY (There is no US Postal Service to this address) or ed to: Proposals are not required to be in hard copy form, PDFs are acceptable. Questions or comments regarding this Request for Proposal may be ed to No telephone calls please Lidar RFP Page 6 of 7

7 Contract Terms After the successful respondent is selected, the County will negotiate a final scope of services and contract. The County will negotiate with the selected firm the time frame for delivery of products and services and the terms and schedule for payment. The final contract will include a liquidated damages clause which will impose financial penalties on the contractor in the event of late product delivery. The selected respondent shall be fully insured to hold the County harmless from any claims involving the employees or equipment used by the selected respondent and subcontractors while executing this service. Evaluation Criteria Proposals will be reviewed and evaluated by the County GIS Policy Committee and the Teton County Engineering staff. Proposals will be judged on the following criteria: Conformance with submission requirements. Project approach. Applicant qualifications, including relevant experience, financial capacity, and staff capabilities. Telephone interviews may be conducted with qualifying firms. The County reserves the right to reject any or all proposals submitted Lidar RFP Page 7 of 7

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