Services:

NHC uses GIS techniques to support its studies in hydrology, numerical hydraulic modeling, flood control, habitat restoration, channel morphology, dredging, fish habitat assessment, coastal geomorphology, identification and inventory of stream crossings, and watershed restoration.

Our GIS-based services include:

• Database Design
  Programming development and design of databases as well as data collection.
• Data Maintenance and Construction
  Including spatial data and metadata development.
• Spatial and Image Analysis
  Designing custom analyses of multiple sources of spatial and attribute data for project planning and design.
• Custom GIS Work
  Building of custom GIS applications and instruction in GIS techniques.
• Risk and Assessment
  Flood risk analysis and floodplain mapping and management.
• Numerical Modeling
  Pre- and post-processing of data as well as mapping of results.
• Advanced Cartography
  Custom map production and presentation.
  

Experience:

Our GIS related work has included:

• FEMA Flood Hazard Mapping and DFIRM Database
  Many maps and hydraulic models to meet FEMA’s specifications for Digital Flood Insurance Rate Maps (DFIRMs). NHC’s civil engineers and hydrologists work closely with GIS experts to delineate floodplain boundaries in accordance with U.S. national standards.
• Custom Tools and Scripts
  Custom designed and user-friendly tools and scripts to streamline workflows for many clients. We create solutions within the Esri ArcGIS framework using Model Builder and Python scripting language.
• GIS Instructional Seminars and Workshops
  Custom designed training workshops to meet the specific needs of clients with different levels of GIS experience. Past groups have included the governments of India, Canada, and British Columbia, as well as county departments and water districts within the U.S. Training can be conducted on- or off-site, or via webinar.
• Advanced Cartography and Map Production
  Properly formatted maps that convey important data quickly. NHC has produced award winning maps that present a clear and accurate depiction of valuable information, and in such a way that meets the expectations of all stakeholders.

Technical Approach & Capabilities:

NHC experts maintain their expertise in using the latest versions of GIS programs and applications through internal and external staff development and training. Some of the major software and applications we presently use include:

• Esri ArcGIS for Desktop (ArcView and ArcInfo)
• Esri Model Builder and Python Scripting
• HEC-GeoRAS and HEC-GeoHMS
• AutoCAD, MicroStation, and Google Earth Integration
• ArcGIS Extensions: 3D Analyst, Spatial Analyst, ArcHydro, ET Surface & ET GeoWizards

Benefits & Results:

• Streamlined workflow, clearer picture of complex data
• Faster analysis, decision making is improved
• Creates greater understanding between project stakeholders