State Mapping Advisory Committee (SMAC)
12:30 PM; November 1, 2000
Nevada Bureau of Mines and Geology
University of Nevada, Reno Campus
Scrugham Engineering-Mines Building
Room 401, Conference Room
Reno, Nevada 89557-0088
12:30 PM: OPENING REMARKS and Welcome by Jon Price, Chairman
Self introductions of participants.
OLD and NEW BUSINESS
Report of activities from the SMAC Geologic Mapping Subcommittee presented by Chris Henry, Nevada Bureau of Mines and Geology. Chris handed out the minutes from the subcommittee's last meeting, October 30, 2000. He summarized the areas of highest geologic interest as being associated with the Las Vegas growth area and the Reno-Carson City growth area and identified current geologic mapping projects in these areas. He listed the current potential projects to be submitted for funding in the upcoming year. The quadrangles discussed included the south half of Last Chance Quadrangle, north half of Horse Springs Quadrangle, the Iceberg Canyon Quadrangle, the Minden Quadrangle, north half of the Virginia City Quadrangle (south half currently in progress), the Sutcliffe Quadrangle, and the west half of the Dogskin Mountain Quadrangle.
Areas identified by the subcommittee for new geologic mapping and future STATEMAP proposals included:
Las Vegas growth area:
Highway 95 corridor between Las Vegas and Searchlight.
Hoover Dam highway bypass area.
I-15 corridor in both directions from Las Vegas.
Reno-Carson City growth area:
Interstate 80 corridor to Fernley East and the Fernley area in general.
Highway 50 corridor between Dayton and Silver Springs.
Flowery Peak quadrangle.
Northeastern Nevada Gold Districts and other requested geologic mapping:
Larger Mining districts in Northeastern Nevada and areas of known mineral deposits.
Updating the County Geologic maps for Humboldt, Eureka, Clark, and Mineral Counties. This could possibly be done as 1:100,000 scale quad mapping compilation projects.
1:24,000 scale mapping in the Humboldt County area in general.
Report on U.S. Geological Survey's National Mapping Division projects in Nevada, by Tom Sturm, U.S. Geologic Survey National Mapping Division:
The current 2001 DOI program in Nevada will spend approximately $650,000 this year. its primary focus is conversion of existing level-one 30-meter DEMs to 10-meter DEMs. This year's project should complete the replacement program for all of the existing level-one DEMs in Nevada. The 10-meter DEM data are generated from the published 1:24,000-scale topographic map series. These data eventually will be merged with the National Elevation Data set (NED) but they will be sampled back to 30 meter resolution as per the defined standard for the NED program. Tom did not know how the Shuttle Topographic Radar Mission (STRM) data would compare to the existing NED or 7.5' DEM data sets. The USGS will eventually distribute the STRM data but it will be some time before the data are completely processed and made available. The STRM data may have a problem in areas with a dense canopy, which can cause an early radar signal return (the radar signal is reflecting off the canopy and not penetrating to the ground) giving an incorrect ground elevation. However, the STRM data set will probably be very useful in measuring change detection in some of Nevada's major mining areas.
DOQs were not produced in Nevada this year because of a concern that the NAPP99 photography would not be out of contract inspection in time to be utilized for DOQ production. At present NAPP99 for Nevada has made it out of contract inspection and approximately 96% of it has been approved for release. The remaining portion had been scheduled to be reflown this past flight season.
The MRLC Land Cover mapping for Nevada has been released. It is available at the following USGS Web site: https://www.usgs.gov/centers/eros/science/national-land-cover-database/. The MRLC data set uses the Anderson level-one and some level-two classification units and is based on 1992-93 Landsat data.
The 2002 Department of Interior (DOI) high priority mapping program will have approximately 10-12 million dollars to work with in the upcoming year. The amount spent in Nevada depends on the amount of overlap and number of votes cast for priority regions in Nevada by DOI agencies. Nevada mapping programs will probably receive between $500,000 and $600,000 in 2002.
Several changes to the program were identified. The USGS will no longer produce transportation and boundary DLG layers. No federal agency has yet stepped up to replace the USGS transportation mapping efforts, and the Federal DOT is basically only concerned with the federal highway system and not minor roads. The Forest Service has CFS road files available for most Forests in the State. Toni Diadone and Mike Turner stated that NDOT is GPS mapping all Nevada State maintained roads and through a different program many of the county roads as well.
This year the DOI program will also entertain requests for high-resolution elevation data from various Radar, IFSAR (Interferometric Synthetic Aperture Radar), and LIDAR (Light/Laser Detection and Ranging) platforms. These data can range from plus or minus a few meters to a few centimeters. The program will also accept requests for various satellite-type map products. All these requests will still be prioritized by the identified number of DOI users requesting the data. Some of these data sets are very expensive and could easily use up a large portion of the available DOI mapping dollars assigned to a state. So, with these higher cost and higher resolution data, it becomes very important to effectively bound the project areas and limit them to those areas that are needed for the individual project.
Report on BLM DOI high priority mapping requirements by Mark O'Brien, Bureau of Land Management State Office and Eric Warmath, USGS Water Resources Division.
This report also included discussion by Tony Daidone of Nevada Department of Transportation (NDOT) DOQ requirements and a potential cooperative agreement to expedite acquisition of some DOQs for NDOT.
Eric and Mark discussed the priority areas they had identified as needing coverage due to their own agency requirements. They also took into account requirements and project areas associated with other DOI agencies, input from the Nevada State Mapping Advisory Committee contact, and the previous list of priorities. The areas identified included:
A part of Eastern Nevada running from the Ruby Valley down to the White River drainage was assigned priority 1. This area is west of the Great Basin National Park and is an area that NDOT is considering a cooperative agreement to acquire 72 DOQQ scenes for a map update project. DOQs, 10-Meter DEMs, and Hydro DLGs were considered for this priority area. This would be first-time DOQ coverage of this.
Priority area 2 is in Northwestern Nevada just Southwest of McDermitt, Nevada. It would complement a current project which is developing DOQs around some Indian reservation property and an area just to the east of the proposed Black Rock Desert Recreation site. DOQs, 10-Meter DEMs, and Hydro DLGs were considered for this priority area.
Priority area 3 includes parts of Eastern Churchill, Mineral, and Esmeralda Counties. This area also included Lahonton and Walker Lake. DOQs, 10-Meter DEMs, and Hydro DLGs were considered for this priority area. This would be first-time DOQ coverage of this area.
Priority area 4 is in Northwest Elko County, near the Idaho state line. DOQs, 10 Meter DEMs, and Hydro DLGs were considered for this priority area. This would be first-time DOQ coverage for most of this area.
Cost of 4 DOQQs (the number required to cover a complete 7.5' topographic map) is $3,200. To do a hydro DLG of a quadrangle can cost either $750 if it does not have to be remapped due to changes in the hydrography or low quality topographic mapping or can cost as much as $3,400 if the hydro has to be re-compiled from new imagery. These are the DOI costs. If another agency wished to cooperate in obtaining DOQs or hydro DLGs the cost to the cooperating agency would be one half of the costs listed above.
Comments were made regarding acquisition of hydrography (stream-channel data). It was considered important that if hydro DLGs were requested that they be identified to cover specific basins and not just partial blocks of quadrangles.
Report on Western Governors Association cadastral development project by Mark O'Brien, Dave Clark, and Steve Lambeth.
With assistance from the Western Governor's Association (WGA), the BLM has developed a project that would utilize some enhancements to the GCDB program and assist County and local cadastral data users in developing a standardized cadastral database throughout the Western States. The GCDB is based on the existing PLSS with accurate geodetic control and monumentation developed through GPS field work and post-processing techniques.
The BLM will be able to fund some county projects in the upcoming year and is currently working with NACO to identify 3 potential county projects for cooperative assistance with the BLM in the upcoming year. The BLM and other users have identified several key issues in regards to western cadastral data. It should be seamless across agency boundaries, well integrated, should contain common information fields, be accurate, and timely. Updates should be made in a timely manner by the responsible agency.
This program is of significant importance due to the increasing number of land-use issues that are being resolved with heavy reliance on digital GIS data input and modeling. Wise land-use management for today, tomorrow, and for the future is one of the themes of this project. Maintaining open space in western states has come to the forefront as a quality of life issue.
Current problems identified with existing cadastral data include the complexity associated with existing data standards. Congress must adequately fund the program. The GCDB data base is currently 90% complete and must be finished as soon as possible. Some digital edge-matching problems with various townships are currently being corrected.
The WGA passed a resolution on this issue: POLICY RESOLUTION 00 - 005; Public Lands Survey System and Ownership Database, Adopted June 13, 2000. It is available on the WGA Web site http://www.westgov.org/wga/policy/00/00005.htm.
State and local agencies need to add all public and local private land survey data to the system. The BLM will put forth a state-specific plan on implementation of this program in early 2001. They wish to partner with various county and local agencies, NACO, tribal entities, utility companies, and other Federal agencies.
For more information contact: Steve Lambeth at 775-861-6543; Dave Clark at 775-861-6558; or Mark O'Brien at 775-861-6440.
Three Nevada counties will be identified as cooperating entities during the first year of the program, 7 during the second year, and 7 during the third year of the program. Jack Holmes with Washoe County is aware of this project.
Jon Price asked if the BLM can use the GCDB data set to determine the acreage of current wilderness study areas? The answer was that the BLM is close to being able to utilize this system to provide those types of statistics and answers.
Status of the Nevada purchase agreement with Space Imaging (EOSAT) for high-resolution IKONOS satellite data presented by Tony Daidone, Nevada Department of Transportation. One-meter, high-accuracy, IKONOS satellite data cost is approximately $100 per square mile. It is rather expensive for a single agency to procure, but may be more applicable and affordable if used in multiple agency projects. If a State agency purchases IKONOS data they can then be shared with other State, county, and local agencies. It still cannot be given out to the private sector and in some cases cannot be shared with Federal agencies if they were not involved in the procurement of the original imagery. NDOT is continuing to work on obtaining funding for a test project using IKONOS data. Interested agencies should contact Tony Daidone directly if they wish to participate in a proposal.
Discussion and possible action item to have the Federal Geographic Data Committee (FGDC) recognize the Nevada State Mapping Advisory Committee as a National Spatial Data Infrastructure (NSDI) cooperating group.
Ron Hess handed out the following request to participants and discussed the reasons for the request and its merits. This request is being made due to comments and presentations given at the 2000 Lake Tahoe National States Geographic Information Council (NSGIC) meeting. Several years ago the FGDC created the NSDI cooperating group program. The intent of the program was to assist in the overall development of Framework data sets nationwide. It was also another way to obtain non-federal input into discussions relating to data standards, formats, and priorities. NSDI was, at its creation, a tool to obtain approval for various Federal standards and digital programs. NSDI has since, by popular demand, become a tool that has given some non-Federal entities input to these various programs and has also allowed for cooperating groups to support those areas they see merit in and not have to accept all of the additional Federal standards or baggage. By requesting this recognition now, SMAC will be listed as a cooperating group at a time when significant changes are taking place in the FGDC. As the FGDC refocuses itself toward Federal agencies, it is hoped that the cooperating group structure will still allow valuable non-Federal agency input too the various mapping and Framework issues that can still have a significant impact on State and local agencies.
The following request was handed out:
November 1, 2000NEVADA STATE MAPPING ADVISORY COMMITTEE
To: Jon Moeller, FGDC Staff Director
590 National Center
Reston, VA 20192
The Nevada State Mapping Advisory Committee respectively requests FGDC recognition as the regional cooperating group for the State of Nevada. The State Mapping Advisory Committee, since 1983, has been active with multiple state, federal, and local agencies in coordination and acquisition of various Framework data layers. We also wish to develop an active role in discussions on future Federal Geographic data acquisition programs, transfer and metadata standards, and continuing the commitment to Framework data acquisition.
Members of the Nevada State Mapping Advisory Committee also serve as Nevada's representatives to the National States Geographic Information Council and to the Western Governors' Association Geographic Information Council. Besides Framework data, the Nevada State Mapping Advisory Committee also develops geologic mapping priorities, for both conventional mapping and digital products, through its Geologic Mapping Subcommittee.
The Nevada State Mapping Advisory Committee, through the Nevada Bureau of Mines and Geology, has been active in supporting a Nevada clearinghouse Web page and, with FGDC support, has also developed and maintains Nevada's FGDC clearinghouse node and is an active supporter of metadata development programs.
The Governor of Nevada established the State Mapping Advisory Committee (SMAC), by an Executive order, in 1983 to advise the U.S. Geological Survey (USGS) on state priorities for map products and to inform maps users about the status of mapping programs and the availability of map products. The Governor named the Director of the Nevada Bureau of Mines and Geology as the chair of SMAC. Membership in SMAC and its subcommittees is open to all state, federal, and local Agencies and anyone else that is interested in mapping in Nevada. Two subcommittees are currently active -- one for geographic information systems (GIS) and one for geologic mapping. Participants have included representatives of numerous local, state, and federal agencies, community colleges and universities, and the private sector.
Jonathan G. Price, Chairman, State Mapping Advisory Committee
Director/State Geologist, Nevada Bureau of Mines and Geology
Ron Hess, Executive Secretary, State Mapping Advisory Committee
Nevada Bureau of Mines and Geology
University of Nevada, Reno/MS 178
Reno, NV 89557-0088
telephone: 775-784-6691 extension 121
fax: 775-784-1709; e-mail: firstname.lastname@example.org
A motion by Gary Johnson was made to request FGDC recognition as a cooperating group and forward the submitted proposed request to the FGDC. It was seconded by Tony Daidone. The motion passed unanimously.
State Mapping Advisory Committee Web Page
ADDITIONAL OLD BUSINESS
Gary Johnson discussed the status of the Nevada State Clearing House Node. After its initial creation it contained 130 metadata records. The Keck web site is, with funding assistance from the FGDC, contributing an additional 1000 records, primarily of Nevada DRG data. Gary, with funding assistance from the FGDC, has presented 7 how-to-do metadata workshops but has had limited success in getting participants to provide approved metadata to the Nevada Clearing House Node. If someone has metadata that they wish to place on the Nevada Clearing House Node or questions about metadata in general they should contact Gary Johnson at 775-784-6691 Ext. 135 or via email at email@example.com. The Web address for the Nevada State Clearing House node is http://nvmeta.nbmg.unr.edu.
The Web site for the Virtual Clearing House of Nevada Geographic Information is http://www.nbmg.unr.edu/geoinfo/geoinfo.htm. This Web site provides links to organizations that provide, develop, or utilize geographic information, including geographic information system (GIS) coverages. At its meeting in January 1998 the State Mapping Advisory Committee agreed to establish this Web site as a clearinghouse for Nevada geographic information. The Nevada Bureau of Mines and Geology volunteered to manage the Web site. Questions or additions to this Web site should be emailed to Ron Hess at firstname.lastname@example.org.
Status of digital data depository at the Keck web site (http://keck.library.unr.edu) at the University of Nevada, Reno, presented by Linda Newman.
The Keck data depository is still growing. There have been some problems in updating and maintaining it due to a lack of funded support staff, but the UNR Library System and the Mackay School of Mines are trying to address these problems. In the meantime, the depository has been serving an increasing number of users. Currently the site has online complete State coverage of Landsat Thematic Mapper (TM) data for all bands dating from 1984-86. It also contains 6 bands of 1992-93 TM data and the DEM used to georeference the imagery. It has online all of the Nevada 1:24,000, 1:100,000, and 1:250,000 scale digital raster graphic (DRG) maps. It also has available some California DRG maps. About 60 percent of the 1:24,000 scale DEMs of Nevada are currently available at this site. The site also contains multiple geoscience data sets. Waiting to be added to the site is complete State coverage of elevation data from the National Elevation Data set (NED), which has been supplied by Nevada State Lands and reformatted by NBMG.
Plans are under way to obtain complete year 2000 Landsat TM coverage and place it on the Keck site. The site also contains several interactive mapping programs with various online data sets including magnetics, gravity, and geologic map indexes. The Web address for this site is http://keck.library.unr.edu".
Linda stated that the Keck site may need a recommendation from SMAC to help obtain needed University support to maintain and continue to develop the Keck Web site. Jon Price and Ron Hess complemented the Web site and the efforts of the library staff to maintain and grow the site. They would also be willing to support and bring such a motion to SMAC for action.
Tom Sturm stated that the DRGs for California have been converted to the UTM projection system by NRCS and that they will eventually be made available on-line. Once they are on-line the Keck site could put a Web link to the site. The current California DRGs that are on the Keck site are in an Albers projection while the DRGs for Nevada, as well as the rest of the country, are in a UTM projection.
Report on NASA State and Local Out-reach Project being developed in coordination with the Western Governors Association (WGA) and National States Geographic Information Council (NSGIC) by Ron Hess.
With NSGIC and WGA guidance the NASA State and Local Out-reach Project continues to move forward although with limited funding. The Western Region NASA workshop was held 2 months ago in Sacramento. Eight representatives from Nevada attended. The workshops are the first phase of a program to allow better utilization of remotely sensed data to be used in state and local government agencies. If the program continues there should be opportunities for fellowships, in agency training, pilot projects, and data acquisition. The WGA has received a small grant which should allow Nevada to host a one day workshop on the capabilities of satellite and aircraft based imaging systems. The workshop will be focused towards state, county, and local agency participation. We are also working towards a Landsat TM, year 2000, data buy through this program. The TM data would then be placed on the Keck Web site for agency and public access. For further information on this project contact Ron Hess at 775-784-6691. The WGA GCDB project was discussed in an earlier presentation.
Discussion of State and Local Agency Mapping Requirements for 2001-2002 and Open Discussion:
Additional 10-meter data along the Colorado river were discussed. Alan Coyner with the Nevada Division of Minerals stated that DOQs would be useful to have as the roads issues associated with RS2477 will again be a topic of the upcoming Legislature.
Ron Hess stated and several others agreed that obtaining complete first time DOQ coverage of Nevada should be a significant priority.
Tom, Eric, Mark, and Ron discussed the usefulness, possible pitfalls, and the cost of Hydro DLG data. If Hydro data are to be requested they should be requested for an entire basin and not solely based on 100K quad boundaries.
The possibility of a demonstration project using LIDAR, Radar, or ASTER data might be of interest to some users. It would be relatively expensive for the amount of area that would be covered.
The Southern Nevada Water Authority requested that an area in Southeast Lincoln County be added to the number 1 high priority area in eastern Nevada. After some discussion it was decided to add this area. The Southern Nevada Water Authority will also look into the possibility of funding a cost-share project with the USGS for the approximately thirty-seven 7.5' quadrangles that were being added to the priority one area. Cooperative cost share per 4 DOQQs (the area covered by one 7.5-minute topographic map) is $1600.
It was decided to leave out of the priority one area the approximately eighteen 7.5' quadrangles that NDOT will be cooperating on to allow the DOI dollars to be expended on mapping that does not have another identified funding source. These quadrangles are in the Ely, White Pine County area.
There was some discussion on DOQs versus 10-meter DEMs versus Hydro DLGs. It appeared that DOQs were still the primary priority with 10-meter DEMs second but Hydro DLGs were still considered important by some attendees. The cost of Hydro DLGs going as high as $3400 per quad was of significant concern, especially with the limited resources available.
It was decided to go with the one through four high priority areas as identified earlier by Mark O'Brien and Eric Warmath with the addition to the priority one area of the approximately thirty-seven 7.5-minute quadrangles of concern to the Southern Nevada Water Authority. DOQs and possibly 10-meter DEMs would be the priority products. Some additional discussion between the DOI participants in regard to the Hydro DLG issue would also take place at a later date and may develop into a test area for obtaining Hydro DLGs for a yet-to-be-identified basin.
5:15 PM: MEETING ADJOURNED
Dave Pickel of the Natural Resources Conservation Service was unable to attend the meeting. He has submitted a written report of his agencies activities regarding various digital data projects, and it is attached to these notes as Attachment One.
Tim Mueller submitted a list of current GIS projects in NDOT's Intermodal Planning Section and the list is included as Attachment Two.
Post Meeting Note:
The request for Federal Geographic Data Committee (FGDC) recognition of the Nevada State Mapping Advisory Committee as a National Spatial Data Infrastructure (NSDI) cooperating group was submitted to the FGDC shortly after approval by the Committee. The FGDC has since approved the request. The Nevada State Mapping Advisory Committee is now recognized as the NSDI Cooperating Group for Nevada.
If you have questions please contact Ron Hess, Executive Secretary, Nevada State Mapping Advisory Committee at (775) 784-6691 x 121 or Email email@example.com.
State Mapping Advisory Committee (SMAC)
Jon Price, Nevada Bureau of Mines and Geology
Ron Hess, Nevada Bureau of Mines and Geology
Michael Turner, Nevada Department of Transportation
Eric Warmath, USGS Water Resources Division
Tom Sturm, USGS National Mapping Division
Michael Wallen, Southern Nevada Water Authority
Nevan Kane, Nevada Division of Environmental Protection
Dan White, USDA Forest Service, Ogden Office
Rita Carman, Nevada Division of State Lands
Linda Newman, University of Nevada, Reno
Rick Connell, Humboldt-Toiyabe National Forest
Alan Coyner, Nevada Division of Minerals
Lorri Peltz-Lewis, US Bureau of Reclamation
Dave Hansen , US Bureau of Reclamation
Tony Daidone, Nevada Department of Transportation
Tim Mueller , Nevada Department of Transportation
Andrew List, Nevada Association of Counties
Jan Gould, City of Reno, NGIS President
Michael Bish, Nevada Department of Transportation
Gary Johnson, Nevada Bureau of Mines and Geology
Mark O'Brien, Bureau of Land Management
Dave Clark, Bureau of Land Management
Steve Lambeth, Bureau of Land Management
Chris Henry, Nevada Bureau of Mines and Geology
Report to the Nevada State Mapping Advisory Committee
Natural Resources Conservation Service
Spatial Data Development
Nevada Watershed/Subwatershed Coverage
A coverage of 11-digit hydrologic units (watersheds) was developed in 1999 according to the National Instruction 170-304 Mapping and Digitizing Watershed and Subwatershed Hydrologic Unit Boundaries. In cooperation with the BLM, the coverage is undergoing quality assurance review for ultimate certification and release. A metadata statement for the coverage has not yet been developed. The coverage was also released to the USGS in Utah (for matching boundaries across state boundaries) and USGS WRD in Nevada.
The national instruction the coverage was developed under was revised in 2000. The revision will cause some 11-digit watershed boundaries to change. Ultimately 14-digit sub-watershed boundaries will need to be compiled and digitized. The NRCS would like to work with all interested parties to develop these data in a cooperative manner. The NRCS does not have the resources to complete this task in a timely manner.
State Invasive Plant GIS
The NRCS is maintaining a statewide GIS of invasive plant locations and related coverages to assist in the control of this very serious challenge to our resource base. This effort is really gaining momentum and we now have participation from the following entities:
USDA Forest Service - Humboldt Toiyabe National Forest
USDA Natural Resources Conservation Service
USDA Cooperative Extension
Nevada Department of Agriculture
Dayton Valley Conservation District
Invasive plant coverages will be maintained and available on the NRCS anonymous ftp site. Eventually three coverages will be available, a point, line and polygon coverage. At this time only the point and polygon coverages have been produced and posted on the coverage USER-ID and the attribute file A_ID. For these data see the following ftp site:
Point coverage: nviv_pnt00.e00
Line coverage: nviv_line00.e00 (not yet available)
Polygon coverage: nviv_poly00.e00
These coverages will be updated sporadically and reposted on the ftp site. Each update will be renamed by appending an incremental number to the '00' until the end of the calendar year. The process starts anew with the new calendar year and its last two digits.
We are actively seeking submissions for the GIS. See the attached document for further details on the GIS and how to submit invasive plant records. This GIS is a cornerstone of the entire invasive plant control effort and will be critical to all facets of the program - research, public education and awareness, funding, and direct control activities. We urge you to work with your agencies to collect and submit these data for the overall state-wide effort.
The need for an additional coverage was identified at the Weed Action Committee meeting in Elko on October 18. Invasive plant control project locations are needed for the final development of the Nevada State Weed Plan. If your agency is gathering and maintaining these kinds of data and can make them available to us then please contact Dawn Raffetry coordinator of the statewide cooperative effort and NDOA noxious weed specialist or Dave Pickel with the NRCS to arrange for delivery.
BLM DOI high priority mapping requirements
In discussions with Mark O'Brien, the NRCS agrees with his assessment of the needs for the state. Mark speaks for the NRCS in expressing the high priority needs in this area of discussion.
Current GIS projects in NDOT's Intermodal Planning Section
Submitted by Tim Mueller, Nevada Department of Transportation
Statewide Transportation Plan (NevPlan)
Statewide Bicycle Plan
Pahrump Transportation Plan
McGill Transportation Plan
Wendover Transportation Plan
Western Nevada Transportation Study
Statewide Transit District
Statewide Transit Routes
Goods Movement Study (Commodity Information)
Tribal Health Care