Morgan Maps – 1886 & 1934 Hydrographic Surveys of Raritan Bay
From June 17 to August 29, 1886, a number of vessels criss-crossed Raritan Bay performing a survey to document its depths. Another survey, similar in nature, was performed between August and November 1934. Both of these charts are available from the National Oceanic and Atmospheric Administration (NOAA), National Geophysical Data Center (NGDC), Bathymetry, Topography & Relief web site. Steps on how to download these files are contained at the bottom of this posting.
Hydrographic Survey (per NOAA) – Measuring of the depth and bottom configuration of water bodies to produce the nation’s nautical charts and ensure safe navigation. The surveys also identify sea-floor materials (important for anchoring, dredging, and pipeline and cable routing), dredging areas, cables, pipelines, wrecks and obstructions, and fish habitats. They support a variety of activities such as port and harbor maintenance (dredging), coastal engineering (beach erosion and replenishment studies), coastal zone management, and offshore resource development.
The mandate to create nautical charts of the nation’s coasts dates back to 1807, when President Thomas Jefferson ordered a survey of the nation’s coast. The Organic Act of 1807 authorized the newly formed coastal survey agency, then called the U.S. Coast Survey, to construct and maintain the nation’s nautical charts.
Vessels or vessel types which participated in the 1886 survey, performed under the command of Lieut G. C. Hanus, U.S.N., were Endeavor, Steam Launch, Whaleboat, Daisy, and Gig. Vessel names and types are not mentioned in the 1934 survey. In the included images, note how the survey from 1886, which might have been the first survey of its type in Raritan Bay, differs from the survey of 1934. The 1886 survey measured what are now the ship channels whereas the 1934 survey leaves these areas unmeasured. The 1934 survey primarily did their measurements from east to west (or vice versa) whereas the 1886 survey did north/south and east/west measurements in the main part of the bay as well as diagonal measurements in areas. In short, probably because it was likely the first survey and the ship technology was probably likely via sail, the 1886 survey appears to be “all over the place”. The 1886 survey does not include Cheesequake Creek whereas the 1934 survey does.
In previous postings, we discussed the 1883 creation of the two Cheesequake Creek jetties and channel for where it enters into Raritan Bay. We also discussed that we have yet to be able to obtain a copy of the US Army Corps of Engineers 1879 survey which is expected to show the shore line configuration of Cheesequake Creek prior to the construction of the jetties & channel. In the mean time, the 1879 US Army Corps of Engineers report by Mr. R. H. Talcott gave a description where Cheesequake Creek (he called it “Cheesequakes Creek”) enters into Raritan Bay as “The general direction of the channel is northeasterly, but before entering the bay it takes a sharp turn to the northwest, and runs about parallel to the bluffs“.
Though we don’t yet have a copy of the 1879 survey, a portion of the 1886 Geodetic survey of Raritan Bay does give an idea of what the mouth of Cheesequake Creek looked like just after the jetties and channel were constructed in 1883. This image not only shows the northwesterly channel described by Mr. Talcott in 1879 but also shows the new jetties, channels, 550 foot long pile-dike closing off the northwestery channel of the Cheesequake Creek, and apparently bridges crossing the new channel and old channel.
It is very exciting to finally see what the area might have looked like during the Revolutionary War times of Captain James Morgan.
How to download the surveys from the NOAA web site:
Please note the following:
- The name you will type in below for the 1886 survey is “H01712” and the 1934 survey is “H05636”.
- These files are very large and will take a long time to download, require you to have or download a special type of “Viewer”, and will take a long time to be able to load in order to view on your PC. The 1886 survey is 130MB and the 1934 survey is 80MB.
- In order to be able to view the files, you will need have or find a software utility which is able to read files of type “.GZ”. One such utility which has a 30 day trial available is called BitZipper. There are other utilities available. This is not an endorcement for or against BitZipper. I used it and it worked OK for me.
- I used BitZipper to convert the file to a plain “.TIF” file and view it in Adobe Photoshop. It’s all pretty convoluted but they are interesting files to view.
- Small snapshots of both charts are contained in this post.
Here are the steps you can take to be able to download charts of both of these surveys.
- Go to the www.ngdc.noaa.gov web site.
- Click on “Bathymetry & Global Relief” (on the left bottom of oval image).
- Under “Bathymetry (Ocean Depths)”, click on “NOS Hydrographic Survey Data”.
- Toward the bottom of the page in the area which says “Data products from NOS surveys”, click on “Hydrographic Survey Data Map Service” (this will take a little while to load).
- Using the scroll bars on the right side of the screen, scroll down until you see “Text Interface”.
- Click on “Text Interface”.
- On the “Hydrographic Survey Database Query” screen, under “Select Data Where” and “SURVEY”, insure the dot is next to “includes” and in the box to the right, type “H01712” for the 1886 survey or “H05636” for the 1934 survey.
- Scroll all the way down on this page and click on the “Select Data” button.
- On the “Query Results” screen, in the leftmost box under “Survey ID”, click on “H01712” (the number you typed in previously) for the 1886 survey or “H05636” for the 1934 survey.
- On the “Survey Product List” screen, in the left most column, click on “H01712.tiz.gz” (note that the file size is 80.2 MB) for the 1886 survey or “H05636.tiz.gz” for the 1934 survey.
- In the “File Download” dialog box, select “Save”.
- In the “Save As” dialog box, select the folder location where you want to put the file.
- From this point, use your utility, e.g., BitZipper, to extract/view the file. Sorry, you’ll have to figure out how to do this.















