Hawai‘i - Statewide Elevation Data

DEM

10m USGS DEMs for all the islands are available, and they're very good quality
- aside from normal USGS distribution, they are also online at UW 10-meter Data
the USGS Hawai'i Clearinghouse surprisingly does not have DEM, but for each island it has a variety of other layers including hillshaded JPEG images

NEXTMap

5m commercial LIDAR-derived elevation is available, as part of the NEXTMap^® USA Dataset
As of 2008, price for the DTM is $25/km2, which is around $5,400 for a USGS quad, with a $500 minimum order.
As of 2011, price for DTM is $40/km2, or DSM for $30/km2.
- As an example, my home area of Ahualoa (~17 km2) would cost ~$700 for the DTM

Lidardata.com

There is other commercial LIDAR data available, either through USGS CLICK or Lidardata.com
As of 2009, the coverage was fairly extensive, shown here in blue:
Although it is linked from the USGS site, the Lidar in this index for Hawaii isn't freely available. Lidardata.com licenses are around $500 + $250/tile. The $500 is a service charge to, reportedly, locate the files on their own server (!)

NOAA Index

The NOAA Topographic and Bathymetric Data Inventory is an index to elevation data (both land and bathymetric), searchable with a map interface, which includes Hawaii. It includes Lidar datasets not mentioned anywhere else:
- 2005 NOAA IfSAR data: Geospatial Coordinator, NOAA Pacific, 808-532-3200. "Restrictions: Yes"
- 2006 DBEDT topographic Lidar: Hawaii, Hawaii State GIS manager, 808 587-2846. "Restrictions: No". Called 10.03.30, spoke to Craig Tasaka who provided a sample of the Waimea data as point data. It looks great!
The sample LIDAR points have sub-meter spacing in most cases. Interpreted as a TIN, for the back of the Waipi'o valley, it looks like this in Enviro:

2007 USACE Pacific Islands LiDAR: Hawaiian Islands

Available from the NOAA CSC Data Access Viewer, as a 32-bit GeoTiff, Geographic, NAD83, 2-meter, vertical units of feet.
It is coastal, in long strips around the islands, basically complete coverage of the shoreline itself.
It is noisy, with lumps, gaps, streaks and many artifacts. It is not bare-earth. This is a sample around Kukuihaele / mouth of Waipio:

Kīlauea LiDAR

http://kilauealidar.com/ notes that 'Kīlauea has had numerous LiDAR acquisitions'

Bathymetry

SOEST Main Hawaiian Islands Multibeam Synthesis
- freely available: the "Complete Multibeam Synthesis" is 50m, a 334 MB netCDF file
- a reduced resolution "Regional Grid" is 1km, 1.8MB, with the unknown areas filled in with the Smith&Sandwell global dataset
- older free data: keating_public.grd (4.5 MB), netCDF grid of Hawaiian Island chain
  - resolution: 1 arc-minute (~2 km)
  - dimensions: 1561 * 901
SOEST Hawaii Coastal Geology Group
- has pointers to the SHOALS LIDAR bathymetry for each island
- unfortunately they are not in any raster format; only massive, irregularly-distributed point data files
- they say the data is from the main SHOALS site
SHOALS (Scanning Hydrographic Operational Airborne LIDAR Survey)
- their Online Hawaiian Data has bathymetric point data for much of the coastlines of each island
- The islands of Kauai, Maui, and parts of Molokai and Oahu were surveyed in 1999. The survey conducted in 2000 included the islands of Hawaii, Maui, Molokai, Lanai, Oahu, and Kauai.
- this data has already been converted from .xyx point data to rasters and is available on the SOEST site above (as rasters?)
- main site says "***Sorry, Data Download capabilities have temporarily been disabled.***"
USGS Pacific Sea Floor Mapping: Hawaiian Islands
- has data for a few areas around the islands, farther from shore than the SHOALS data
- they are in UTM 4/5, with 20m grid spacing - very nice!
- the format is GeoTIFF, and the values appear to be offset by +65536
- i've also encountered a chopped-up version of this dataset, in Surfer GRD format, without the offset problem, from a person at UH
NGDC TerrainBase
- has some "30 minute" "regular grid" data for the "Hawaiian Islands coast"
- however, it's quite spotty, misses whole islands