Skip to article frontmatterSkip to article content
Site not loading correctly?

This may be due to an incorrect BASE_URL configuration. See the MyST Documentation for reference.

4 - Same Recipe, New Region

Same Recipe, New Region

We built and explored a coastal DEM for Newport, Oregon.

Now we will reuse the same workflow in a very different setting:

Sarasota, Florida

keep the reusable recipe
          +
change the local pieces
          ↓
new coastal DEM

We will launch Sarasota and then leave it running while we move to Module 5.

1. Move to Sarasota

Our Sarasota study area is:

West:  -82.59
East:  -82.53
South:  27.28
North:  27.34
Satellite and aerial imagery of the Sarasota, Florida workshop study area around Siesta Key, with the final DEM region outlined in red.

Sarasota, Florida Study Area. The red box shows the DEM area.

Compared with Newport, Sarasota is a low-relief Gulf coast with shallow nearshore waters.

The setting changes substantially.

The workflow does not need to start over.

2. Change only what is local

Keep:

coupling-bathy-topo
-P epsg:4269+5703
-X 6:5
-E 0.1111111s

Change:

study-area bounds
local DAV dataset
output name
output directory
shared-cache location
Newport → Sarasota comparison
SettingNewportSarasota
Region-124.10/-124.00/44.59/44.64-82.59/-82.53/27.28/27.34
National bundlecoupling-bathy-topocoupling-bathy-topo
Local DAV dataset969310196
Output namenewportsarasota
Output directory~/workshop/newport_dem~/workshop/sarasota_dem
Prepared cache~/workshop/newport_data~/workshop/sarasota_data
Resolution~1/9 arc-second~1/9 arc-second
Combined reference systemepsg:4269+5703epsg:4269+5703
Tile overlap / source buffer-X 6:5-X 6:5

The reusable scientific recipe stays the same. The study area, local data, and output locations change.

3. Find the Sarasota lidar

Open NOAA Digital Coast DAV for Sarasota

Need a reminder for finding the DAV dataset ID?

In the dataset details:

  1. Scroll to Bulk Download.

  2. Click Link to All Dataset Files.

  3. Find the number near the end of the URL:

.../XXXXX/index.html
      ↑
  dataset ID

Then use:

dav:survey_id=XXXXX,weight=100
Reveal the Sarasota dataset

2024 USACE FEMA Topobathy Lidar: Post Hurricane Milton, FL

DAV dataset ID:

10196

Local source:

dav:survey_id=10196,weight=100

Newport used 9693; Sarasota uses 10196. The source syntax stays the same.

4. Launch the Sarasota build

Run:

globato build \
  -R -82.59/-82.53/27.28/27.34 \
  -X 6:5 \
  -P epsg:4269+5703 \
  -E 0.1111111s \
  -O sarasota \
  -D ~/workshop/sarasota_dem \
  --shared-cache ~/workshop/sarasota_data \
  coupling-bathy-topo \
  dav:survey_id=10196,weight=100
If the Sarasota directories are missing

Rerun:

bash ~/shared/setup_workshop.sh

Then confirm:

ls -ld ~/workshop/sarasota_data ~/workshop/sarasota_dem
Sneak peek: Sarasota DEM
Hillshade of the Sarasota, Florida coastal DEM.

Sarasota coastal DEM. Module 5 will return to this DEM after evaluating Newport with IVERT.

The takeaway

same recipe + new local choices = new local DEM

You changed the study area, local lidar, and output locations while keeping the reusable coastal recipe and core processing settings.

The Sarasota build shows how the same workflow can be transferred to a new coastal region by changing only the local choices.

Next, we ask the question that matters after any DEM is built:

How well does it agree with independent observations?

Next: Module 5 — Evaluate the DEMs with IVERT

Workshop
3 - Explore the Newport DEM
Workshop
5 - Evaluate the DEMs with IVERT