Geospatial PDF Map of the Compilation of GIS Data for the Mineral Industries and Related Infrastructure of Africa By Elizabeth R. Neustaedter, Ryan F. Kemna, Abraham J. Padilla, and Donya Otarod 2024
U.S. Department of the Interior U.S. Geological Survey 20°W
0°
20°E
40°E
Open-File Report 2024–1041
60°E
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INTRODUCTION
TUNISIA
In 2021, the U.S. Geological Survey's (USGS) National Minerals Information Center (NMIC) completed the project titled "Compilation of geospatial data for the mineral industries and related infrastructure of Africa." This project aimed to leverage the expertise and capabilities of the NMIC to collect, synthesize, and interpret geospatial data to inform on the extractive resources of the African region and expand the NMIC's understanding on the impact of mineral industry of African nations in the global economy. The African region, which comprises the independent nations that make up the African continent and its associated islands and dependencies, consists of a total of 58 mineral producing countries. The primary objective of this effort was to create a fully attributed Geographic Information System (GIS) portraying existing mining infrastructure, resources, and development capacity across Africa along with the related infrastructure capable of supporting current (for the reference year 2018) and future extractive industry operations in the region. The compiled GIS geodatabase with supporting documentation including comprehensive metadata was published as a USGS data release titled "Compilation of Geospatial Data (GIS) for the Mineral Industries and Related Infrastructure of Africa" (Padilla and others, 2021).
Mediterranean Sea
MOROCCO 30°N
ALGERIA
LIBYA
EGYPT
WESTERN SAHARA (MOROCCO)
This georeferenced portable document format (GeoPDF) map sheet presents a new geographic information product containing a partial representation of the GIS data published by Padilla and others (2021). This GeoPDF map provides a visual comparison of the distribution of mineral industry and related infrastructure GIS data, which contributes to a deeper understanding of the intersections and complexities of the extractive industries within Africa.
OVERVIEW OF GEOSPATIAL PDF MAP LAYOUT (LAYER NAVIGATION AND VISIBILITY)
MAURITANIA MALI
Red Sea
NIGER
CABO VERDE
SUDAN SENEGAL THE GAMBIA
GUINEA-BISSAU
GUINEA
10°N
SIERRA LEONE
ATLANTIC OCEAN
Table 1. List of attribute field names and their associated field aliases from the "Africa_GIS.gdb" geodatabase (Padilla and others, 2021) provided to aid in the interpretation of the project schema when viewing attribute data using the "Identify" tool in the TerraGo Toolbar (geodatabase feature class names are provided in parentheses).
The GeoPDF map sheet created for this project contains the feature datasets and their feature classes organized as map layers. Within a PDF reader, such as Adobe Acrobat Reader, these map layers are accessed through a "Layers" navigation pane in the side panel menu when the GeoPDF file is open. Figure 1 illustrates the navigation pane and a list of feature dataset folders that contain the feature classes, or individual map layers, within the GeoPDF.
ERITREA
CHAD BURKINA FASO
DJIBOUTI
BENIN
TOGO CÔTE D'IVOIRE GHANA LIBERIA
NIGERIA CENTRAL AFRICAN REPUBLIC
CAMEROON
ETHIOPIA
SOUTH SUDAN
SOMALIA
EQUATORIAL GUINEA Gulf of Guinea
SÃO TOMÉ AND PRÍNCIPE
EXPLANATION
UGANDA
REPUBLIC OF GABON CONGO
KENYA RWANDA
Mineral Production Sites and Mineral Processing Facilities [where many symbols overlap, labels are shown in general areas]
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A @ op
Oil and Gas Fields Mines and Quarries Mineral Processing Plants
DEMOCRATIC REPUBLIC OF CONGO
Oil and Gas Refineries Brine
BURUNDI
INDIAN OCEAN
TANZANIA
SEYCHELLES
Mineral Resources
10°S
Figure 1. Screenshot of the "Layers" navigation pane open and the list of feature dataset folders within the GeoPDF (visibility of all feature dataset folders is turned on).
Base and precious metals
Coal
Ferrous metals
K (potassium/potash)
Industrial minerals
PGE (platinum-group elements)
Non-ferrous metals
REE (rare earth elements)
Cu (copper)
U (uranium)
W Mineral Deposits X
MALAWI
ANGOLA
Mineral Exploration Sites
!
COMOROS
ZAMBIA
Oil and Gas Resources Geologic Provinces with Undiscovered Oil and Gas Resources
MOZAMBIQUE
Continuous
Conventional
Countries with Oil and Gas Recoverable Resources ± Production Non-producer Gas producer
Oil producer Oil and gas producer
ZIMBABWE NAMIBIA
Energy Infrastructure
BOTSWANA
LNG Terminal Oil and Gas Pipeline
Electric Power Generating Facilities
>1,000 MW
Electric Power Transmission Lines
30°S
Transportation Infrastructure Motorway
Trunk road
Î
Primary road Port Railroad
ESWATINI
100–1,000 MW
EHV (extra high voltage) HV (high voltage) MV (medium voltage) LV (low voltage)
10–100 MW
LESOTHO
<10 MW ! .
Not applicable
SOUTH AFRICA
Cartographic Elements
Major city (pop. >1,000,000)
^
Capital/seat of government International boundary River Lake
Base from Center for Spatial Sciences at the University of California, Davis, Global Administrative Areas database (https://gadm.org/data.html) Africa Albers Equal-Area Conic projection World Geodetic System of 1984
GIS geodatabase compiled by Abraham J. Padilla, Donya Otarod, Sidney W. Deloach-Overton, Ryan F. Kemna, Philip A. Freeman, Erica R. Wolfe, Laurence R. Bird, Andrew L. Gulley, Michael H. Trippi, Connie Dicken, Jane M. Hammarstrom, and Amanda S. Brioche.
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0
500
500
1,000
1,000
Baker, M.S., Buteyn, S.D., Freeman, P.A., Trippi, M.H., and Trimmer, L.M., III, 2017, Compilation of geospatial data for the mineral industries and related infrastructure of Latin America and the Caribbean: U.S. Geological Survey Open-File Report 2017–1079, 87 p., 1 geodatabase and 1 geospatial PDF map, https://doi.org/10.3133/ofr20171079. Padilla, A.J., Otarod, D., Deloach-Overton, S.W., Kemna, R.F., Freeman, P.A., Wolfe, E.R., Bird, L.R., Gulley, A.L., Trippi, M.H., Dicken, C.L., Hammarstrom, J.M., and Brioche, A.S., 2021, Compilation of geospatial data (GIS) for the mineral industries and related infrastructure of Africa: U.S. Geological Survey data release, https://doi.org/10.5066/P97EQWXP. TerraGo Technologies, Inc., 2024a, GeoPDF toolbar: TerraGo Technologies, Inc., accessed April 19, 2024, at https://terragotech.com/products/geopdf/toolbar/. TerraGo Technologies, Inc., 2024b, GeoPDF toolbar: TerraGo Technologies, Inc., accessed April 19, 2024, https://support.terragotech.com/hc/en-us/categories/360004388494-GeoPDF-Toolbar.
To aid in the visual interpretation of the Mineral Facilities feature class, which contains a large number of overlapping symbols and labels, it was divided into five separate selectable map layers for this GeoPDF based on the categories of facility type: Brine, Mines and Quarries, Mineral Processing Facilities, Oil and Gas Fields, and Oil and Gas Refineries. This allows for a better understanding of the geographic distribution of the various types of facilities. These map layers are located within the "Mineral Facilities" feature dataset folder in the layers navigation pane. No other feature classes were modified from the original geodatabase from Padilla and others (2021).
REUNION (FRANCE)
[Abbreviations: LNG, liquefied natural gas; MW, megawatts]
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MAURITIUS
MADAGASCAR
If all of the map layers are turned on simultaneously, the map will be illegible due to the number of overlapping map layers and labels present in the GeoPDF. However, a user may selectively turn on or off different map layers and their labels in the layers navigation pane to analyze the spatial relationships between the available map layers. Base cartographic elements that are visible upon opening the GeoPDF map, such as vector polyline data for rivers and vector polygon data for countries for example, can be turned off for clearer visual interpretation of map layers. Additionally, annotation layers for labels, which directly precede their corresponding map layer in the layers navigation pane, can also be turned on and off separately for better visual clarity. A user is able to generate different maps by controlling the visibility of map layers and their labels, which can then be printed as individual maps. For example, a user could overlay oiland gas-field center points with the USGS petroleum provinces to determine which cluster of oil and gas fields is located within a specific petroleum province; the user will then have the ability to print out that specific representation.
REFERENCES CITED [For a full list of references cited, see the associated geodatabase by Padilla and others (2021)]
1,500 MILES
This GeoPDF also includes a subset of the attribute data for 12 of the feature classes that are contained within the "Africa_GIS.gdb" geodatabase file (Padilla and others, 2021). The attribute data are presented using the schema from Padilla and others (2021), and table 1 can be used to interpret the attribute field names with their associated attribute field aliases. In this table, attribute data for the Mineral Facilities feature dataset are provided since attribute names and aliases are identical for the five mineral facility type map layers. The attribute data contained within the GeoPDF map can be accessed using the "Identify" tool in the TerraGo Toolbar, which can be downloaded and installed at no cost from https://terragotech.com/products/geopdf/toolbar/ (TerraGo Technologies Inc., 2024a). Detailed instructions for navigating the layers of the GeoPDF map as well as accessing the attribute data can be found in Baker and others (2017) and TerraGo Technologies Inc. (2024b).
1,500 KILOMETERS
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. For sale by U.S. Geological Survey, Box 25286, Denver Federal Center, Denver, CO 80225; https://store.usgs.gov; 1-888-ASK-USGS (1-888-275-8747). Suggested citation: Neustaedter, E.R., Kemna, R.F., Padilla, A.J., and Otarod, D., 2024, Geospatial PDF map of the compilation of GIS data for the mineral industries and related infrastructure of Africa: U.S. Geological Survey Open-File Report 2024–1041, 1 geospatial map, scale 1:38,504,000, https://doi.org/10.3133/ofr20241041.
Digital cartography by Elizabeth R. Neustaedter, Ryan F. Kemna, Abraham J. Padilla, and Donya Otarod Edited by David A. Shields Manuscript approved for publication on 06/27/2024 ISSN 2331-1258 (online) https://doi.org/10.3133/ofr20241041
Associated data for this publication: Padilla, A.J., Otarod, D., Deloach-Overton, S.W., Kemna, R.F., Freeman, P.A., Wolfe, E.R., Bird, L.R., Gulley, A.L., Trippi, M.H., Dicken, C.L., Hammarstrom, J.M., and Brioche, A.S., 2021, Compilation of geospatial data (GIS) for the mineral industries and related infrastructure of Africa: U.S. Geological Survey data release, 1 geodatabase, https://doi.org/10.5066/P97EQWXP.