CCZO -- GIS/Map Data, Photographic Imagery -- 1933 aerial imagery composite -- Calhoun Experimental Forest, SC -- (1933-1933)


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Created: Nov 19, 2019 at 6:07 a.m.
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Abstract

The zip file contains a large tiff mosaic stitched together from a series of aerial photographs of the Calhoun CZO area taken in 1933, when the area was being acquired by the US Forest Service. USFS archaeologist Mike Harmon delivered the black-and-white photographs, known to him as the 'Sumter National Forest Purchase Aerials', to us in a box. The photographs include most of the Enoree District of the Sumter National Forest, including the entirety of the Calhoun CZO, not just the long-term plots and small watersheds. The photographs were scanned and georectified, then color-balanced and stitched together following 'seams' - high-contrast features such as rivers and roads ('seamlined'). In addition to the main tiff are four files that can be used to properly geolocate the composite image in ArcGIS.

The multilayer pdf file includes a smaller version of the seamlined 1933 aerial photography mosaic raster layer, as well as this aerial mosaic transparent over slope map (for a 3D-like 1933 image raster). Other layers include contours, roads, boundaries, sampling locations, 1.5 m DEM, 1.5m slope, 1m 2013 NAIP aerial imagery, and 2014 canopy height. The pdf file includes both 'interfluve order' and 'landshed order.' These two layers mean the same thing, but the landshed is the area unit around the interfluve that is used for statistics; this dataset has been QC'ed. The Interfluve Order network was used to delineate the landsheds and agrees with it >95% of the time, but has a few inaccuracies (it was automated by the computer) that were fixed manually. Use the network for viewing and considering the landscape at large, but for the specific interfluve order, check the color of the 'Landshed Order' dataset to verify its accuracy.

Date Range Comments: The exact date these photos were taken is unknown, but the year is thought to be 1933.The flight date is prior to the USFS land purchases for the Enoree District of the Sumter National Forest; the photos are thus known as the "pre-purchase photos").

Subject Keywords

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Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Calhoun Experimental Forest and Eco-hydrology Experiments, Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas, Calhoun Experimental Forest, SC
North Latitude
34.6700°
East Longitude
-81.6000°
South Latitude
34.5400°
West Longitude
-81.8000°

Temporal

Start Date:
End Date:

Content

ReadMe.md

CCZO -- GIS/Map Data, Photographic Imagery -- 1933 aerial imagery composite -- Calhoun Experimental Forest, SC -- (1933)


OVERVIEW

Description/Abstract

The zip file contains a large tiff mosaic stitched together from a series of aerial photographs of the Calhoun CZO area taken in 1933, when the area was being acquired by the US Forest Service. USFS archaeologist Mike Harmon delivered the black-and-white photographs, known to him as the 'Sumter National Forest Purchase Aerials', to us in a box. The photographs include most of the Enoree District of the Sumter National Forest, including the entirety of the Calhoun CZO, not just the long-term plots and small watersheds. The photographs were scanned and georectified, then color-balanced and stitched together following 'seams' - high-contrast features such as rivers and roads ('seamlined'). In addition to the main tiff are four files that can be used to properly geolocate the composite image in ArcGIS.

The multilayer pdf file includes a smaller version of the seamlined 1933 aerial photography mosaic raster layer, as well as this aerial mosaic transparent over slope map (for a 3D-like 1933 image raster). Other layers include contours, roads, boundaries, sampling locations, 1.5 m DEM, 1.5m slope, 1m 2013 NAIP aerial imagery, and 2014 canopy height. The pdf file includes both 'interfluve order' and 'landshed order.' These two layers mean the same thing, but the landshed is the area unit around the interfluve that is used for statistics; this dataset has been QC'ed. The Interfluve Order network was used to delineate the landsheds and agrees with it >95% of the time, but has a few inaccuracies (it was automated by the computer) that were fixed manually. Use the network for viewing and considering the landscape at large, but for the specific interfluve order, check the color of the 'Landshed Order' dataset to verify its accuracy.

Creator/Author

Brecheisen, Zachary S.|Cook, Charles W.|Harmon, M.A.

CZOs

Calhoun

Contact

Zachary Brecheisen, Nicholas School of the Environment, Box 90328, Duke University, Durham, NC 27708. zachary.brecheisen@duke.edu




SUBJECTS

Disciplines

GIS / Remote Sensing

Topics

GIS/Map Data|Photographic Imagery

Subtopic

1933 aerial imagery composite

Keywords

GIS|Calhoun|historical photographs

Variables

raster image data

Variables ODM2

Aerial photography




TEMPORAL

Date Start

1933-01-01

Date End

1933-12-31

Date Range Comments

The exact date these photos were taken is unknown, but the year is thought to be 1933.




SPATIAL

Field Areas

Calhoun Experimental Forest and Eco-hydrology Experiments|Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas

Location

Calhoun Experimental Forest, SC

North latitude

34.67

South latitude

34.54

West longitude

-81.8

East longitude

-81.6




REFERENCE

CZO ID

4324



Additional Metadata

Name Value
czos Calhoun
czo_id 4324
keywords GIS, Calhoun, historical photographs
variables raster image data
disciplines GIS / Remote Sensing
date_range_comments The exact date these photos were taken is unknown, but the year is thought to be 1933.

How to Cite

Brecheisen, Z. S., C. W. Cook, M. Harmon (2021). CCZO -- GIS/Map Data, Photographic Imagery -- 1933 aerial imagery composite -- Calhoun Experimental Forest, SC -- (1933-1933), HydroShare, http://www.hydroshare.org/resource/3edb9720a11845169dae4ba5b6212d27

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
CC-BY

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