Archive of post-Hurricane Charley coastal oblique aerial photographs collected during U.S. Geological Survey field activity 04CCH01 from Marco Island to Fort DeSoto, Florida, August 15, 2004

Data Series ◽  
10.3133/ds651 ◽  
2012 ◽  
Author(s):  
Janice A. Subino ◽  
Karen L.M. Morgan ◽  
M. Dennis Krohn ◽  
Gregory K. Miller ◽  
Shawn V. Dadisman ◽  
...  
Keyword(s):  
Geological Survey ◽  
Aerial Photographs ◽  
Field Activity ◽  
Hurricane Charley

The year in focus, 2000

2001 ◽  
pp. 7-10
Author(s):  
Kai Sørensen
Keyword(s):  
Geological Mapping ◽  
Geological Survey ◽  
Seismic Survey ◽  
East Greenland ◽  
Major Field ◽  
Original Series ◽  
West Greenland ◽  
Level Of Activity ◽  
Field Activity ◽  
Year 2000

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Sørensen, K. (2001). The year in focus, 2000. Geology of Greenland Survey Bulletin, 189, 7-10. https://doi.org/10.34194/ggub.v189.5148 _______________ The year 2000 was unusual in that it lacked major field activity directly involved with the systematic geological mapping of Greenland. However, field activities were again many and varied, including a successful highresolution seismic survey offshore central West Greenland, and a joint Geological Survey of Denmark and Greenland (GEUS) – Danish Lithosphere Centre (DLC) project centred on Kangerlussuaq in southern East Greenland. Of the Survey’s 354 personnel, 93 were allocated to Greenland-related activities (Table 1). The Greenland level of activity in 2000, both in Copenhagen and in the field, thus compared favourably with that of 1999.

scholarly journals Analytical procedures for 3D mapping at the Photogeological Laboratory of the Geological Survey of Denmark and Greenland

2018 ◽  
pp. 99-104 ◽  
Author(s):  
Erik Vest Sørensen ◽  
Mads Dueholm
Keyword(s):  
Three Dimensional ◽  
Three Dimensions ◽  
Geological Survey ◽  
Aerial Photographs ◽  
3D Mapping ◽  
Digital Version ◽  
Remote Sensing Technique ◽  
Small Frame ◽  
Analytical Procedures ◽  
Steep Terrain

Photogrammetry is a classical remote sensing technique dating back to the 19th century that allows geologists to make three-dimensional observations in two-dimensional images using human stereopsis. Pioneering work in the 1980s and 1990s (Dueholm 1992) combined the use of vertical (nadirlooking) aerial photographs with oblique stereo images from handheld small-frame cameras into so-called multi-model photogrammetry. This was a huge technological step forward that made it possible to map, in three dimensions, steep terrain that would otherwise be inaccessible or poorly resolved in conventional nadir-looking imagery. The development was fundamental to the mapping and investigation of e.g. the Nuussuaq basin (Pedersen et al. 2006). Digital photogrammetry, the all-digital version of multi-model photogrammetry, is nowadays an efficient and powerful geological tool that is used by the Photogeological Laboratory at the Geological Survey of Denmark and Greenland (GEUS) to address geological problems in a range of projects from 3D mapping to image-based surface reconstruction and orthophoto production. Here we present an updated description (complementary to Dueholm 1992) of the analytical procedures in the typical digital workflow used in current 3Dmapping projects at GEUS.

scholarly journals Preliminary results of mapping in the crystalline complex around Rypefjord and Rødefjord, and on northern Milne Land, Scoresby Sund, East Greenland

1971 ◽  
Vol 37 ◽  
pp. 5-18
Author(s):  
N Henriksen ◽  
A.K Higgins
Keyword(s):  
Geological Survey ◽  
Aerial Photographs ◽  
Crystalline Complex ◽  
East Greenland ◽  
Preliminary Results ◽  
The Third ◽  
Field Season ◽  
Geological Map ◽  
Team Project ◽  
Topographical Maps

The Geological Survey of Greenland (GGU) carried out in 1970 the third summer of mapping in the crystalline complex of the Scoresby Sund region. The region mapped was the continuation southwards of that mapped the previous two summers in the inner fjord zone. The main geological divisions encountered correspond generally to those aIready known and described briefly by Henriksen & Higgins (1969, 1970). The 1970 mapping of the crystalline complex was a team project in which eight geologists participated. Each geologist mapped about 500-600 km2 in a field season of about six weeks. While excellent exposures facilitated the work extensive use of helicopters was necessary to cover the region in the time available and some parts, can only be considered as mapped to a reconnaissance standard. Topographical maps at a 1:50 000 scale, enlarged from 1:200 000 originals, were used for compilation of geological results and extensive use was made of oblique and vertical aerial photographs. The geologists participating during 1970 were: B. Chadwick, Exeter; J. D. Friderichsen, Copenhagen; N. Henriksen, Copenhagen; A. K. Higgins, Copenhagen; P. Homewood, Lausanne; L. Jemelin, Lausanne; H. Rutishauser, Bern and K. Sørensen, Aarhus. The areas mapped by each geologist are shown on the key of the geological map (map 1). This report is based on information supplied by all the geologists and many of the views presented originated from other members of the mapping team. However, the writers are responsibIe for the interpretations given in this paper which do not necessarily coincide exactly with those of their colleagues. In due course many of the geologists will present detailed accounts of their individual areas and GGU plans to publish 1:100 000 map sheets of the region.

scholarly journals Microplankton and sedimentological studies in the Nûgssuaq and Disko region, central West Greenland

1976 ◽  
Vol 80 ◽  
pp. 39-42
Author(s):  
J.M Hansen
Keyword(s):  
Natural Science ◽  
Field Work ◽  
Basin Analysis ◽  
Geological Survey ◽  
Main Field ◽  
West Greenland ◽  
Field Activity

In 1975 the Danish Natural Science Foundation (SNF) and the Geological Survey of Greenland (GGU) initiated an investigation of the microplankton (dinoflagelIate cyst) of the Cretaceous and Tertiary sediments in central West Greenland. The purpose of this investigation is the establishment of a dinoflagelIate stratigraphy based on samples from measured sections to assist in a basin analysis. SNF provided the funds for the establishment of a laboratory for palynological preparation and investigation. They also funded a Leitz Orthoplan microscope with a Leica camera for the study of the microplankton, and two of the six Honda ATC 90 motor tricycles that facilitated the field work. The main field activity in 1975 has been outlined by Croxton (this report). As mentioned by Schiener & Henderson (1975), seven weeks field work were carried out in 1974 by the writer and T. Jürgensen. In 1974 ten sections (M1 - M10) totalling 2670 m of sediment were measured and 201 samples were collected. T. Jürgensen also measured a series ofsections (T2 -T14). In 1975 nineteen sections(M11-M29) were measuredand 837 samples were collected (see fig. II for localities).

scholarly journals Review of the Survey's activities in 1978

1979 ◽  
Vol 95 ◽  
pp. 5-8
Author(s):  
K Ellitsgaard-Rasmussen
Keyword(s):  
Snow Cover ◽  
Air Force ◽  
Field Work ◽  
Aerial Photographs ◽  
Topographic Maps ◽  
Main Field ◽  
Geodetic Institute ◽  
Geological Maps ◽  
Field Activity ◽  
North Greenland

The main field activity of the Survey in 1978 was a study of the geology of North Greenland (fig. 1). This was the first summer of a three year project which aims at a geological synthesis of the whole region together with the compilation of two 1:500000 geological maps. Significant additions to the geological knowledge of the area included the discovery ol an extensive Proterozoic basalt province, an extension of the known distribution of the late Proterozoic to Silurian strata, and of the late Palaeozoic to Tertiary Mesozoic sequences of the Wandel Sea Basin. The field work has been undertaken in cooperation with the Geodetic Institute, establishing a set of ground central points for the preparation of topographic maps of northern Greenland. These maps will be based on a new set of aerial photographs which were taken during the summer. The Danish Air Force using a Hercules aircraft flew in the group of 32 geologists and surveyors and their equipment to Station Nord. Geological studies and surveying went according to plan, in spite of more snow cover than usual in most of Peary Land.

scholarly journals Geological photogrammetry using standard colour slides

1986 ◽  
Vol 130 ◽  
pp. 69-74
Author(s):  
K.S Dueholm ◽  
A.A Garde
Keyword(s):  
Major Part ◽  
Geological Survey ◽  
Aerial Photographs ◽  
New Type ◽  
Set Up

Photogrammctric mapping methods (Dueholm, 1979; Jepsen & Dueholm, 1978; Pedersen, 1981) are widely used by the Geological Survey of Greenland (GGU). However, until now it has only been possible to use vertical aerial photographs taken with large frame photogrammetric cameras. As a major part af the geology in Greenland is exposed on steep mountain sides. there are many afcas that e(]llllot be rnappcd from vertical aerial pl1otographs. In 1983 a research projccl was set up to invcstigate phologrammetric mapping using commerci ally available oblique aeria! photographs, as well as terrestriaJ photographs taken by geologists with ordinary 24/36 mm cameras (fig. 1). A new type of photogrammetric instrument, the Kern DSR11/GP1 AnalyticaI Plotter, was procured for this and other projects. Here we present results and experience from the first successful mapping in Greenland with an ordinary 24/36 mm camera.

North-East Greenland 1997–1998: a new 1:500 000 mapping project in the Caledonian fold belt (72°–75°N)

1998 ◽  
pp. 119-127
Author(s):  
Niels Henriksen
Keyword(s):  
Field Work ◽  
Geological Survey ◽  
Aerial Photographs ◽  
Fold Belt ◽  
The South ◽  
Marine Research ◽  
East Greenland ◽  
North East ◽  
The North ◽  
Field Investigations

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Henriksen, N. (1998). North-East Greenland 1997–1998: a new 1:500 000 mapping project in the Caledonian fold belt (72°–75°N). Geology of Greenland Survey Bulletin, 180, 119-127. https://doi.org/10.34194/ggub.v180.5095 _______________ The Geological Survey of Denmark and Greenland (GEUS) continued in 1997 the systematic geological mapping programme for the 1:500 000 regional map series, with initiation of field work on sheet no. 11, which covers part of North-East Greenland. Of the 14 planned map sheets at 1:500 000 which will cover all of Greenland, 11 have been published, and one additional sheet for which field work has been completed is under compilation. Only two areas of Greenland are not yet covered by map sheets of this series: part of North-West Greenland (sheet no 6) and the target for the present project in North-East Greenland (sheet no. 11). The field work for the latter sheet is planned for two seasons, with the first season completed in 1997 and the second and final season to follow in 1998. The map sheet (no. 11) covers the region between Kong Oscar Fjord and the Stauning Alper in the south (72°N) and Kuhn Ø and Grandjean Fjord in the north (75°N, Fig. 1). The western part of this region is dominated by crystalline complexes of the East Greenland Caledonian fold belt. A post-Caledonian sequence of Upper Palaeozoic and Mesozoic sediments and Tertiary plateau basalts and intrusions covers the eastern part of the region. This article focuses on the Caledonian geology, whereas results from the work in the post-Caledonian sediments are described in the article by Stemmerik et al. (1998, this volume). The new Survey work for map sheet 11 represents a reinvestigation of areas extensively studied by geologists of Lauge Koch’s expeditions to East Greenland (1926–58), the principal results of which were compiled by John Haller for the 1:250 000 map sheets covering the region 72°–76°N (Koch & Haller 1971) and incorporated into an impressive regional description of the East Greenland Caledonides (Haller 1971). The Scoresby Sund region to the south of latitude 72°N and the Dove Bugt region to the north of latitude 75°N have already been investigated by the Geological Survey of Greenland (Henriksen 1986, 1997; Higgins 1994) as part of the present ongoing 1:500 000 regional mapping programme. The 1997–1998 mapping project will fill the last remaining gap in the Survey’s 1:500 000 coverage of North-East Greenland. All of North-East Greenland is covered by a set of wide angle black and white vertical aerial photographs taken in the period 1978–87 from an altitude of c. 14 km. On the basis of these aerial photographs and ground control points established by Kort- og Matrikelstyrelsen (National Survey and Cadastre – formerly the Geodetic Institute), new topographical maps of the entire region 72°–75°N, at a scale of 1:100 000, with 100 m contours, are being drawn at the Survey and will serve as a basis for the field investigations and the subsequent geological map compilations. Drawing of the topographic maps in the Survey´s photogrammetric laboratory is combined with photogeological interpretation both prior to and following the field investigations. In addition to establishing a general overview of the regional geology, the project includes activities aimed at supplementing knowledge of the economic potential of the region, in respect to both minerals (Harpøth et al. 1986) and hydrocarbons (Christiansen et al. 1992; Stemmerik et al. 1997). The field work co-ordinated by the Survey included co-operation with a geophysicist from the Alfred Wegener Institute for Polar and Marine Research (AWI), Bremerhaven, who undertook rock magnetic investigations to facilitate interpretation of an AWI aeromagnetic survey, and four Norwegian sedimentologists from Saga Petroleum whose work was integrated with a Survey group working with Mesozoic sediments (Stemmerik et al. 1998, this volume). Logistic support was also given to three groups of geologists from the University of Oslo and three geologists from Massachussetts Institute of Technology, with whom agreements on scientific co-operation had been arranged in advance. Some aspects of the project are based on funding from the Danish National Science Foundation and Carlsberg Foundation, with support for special research topics concerning the pre-Caledonian basement terrain, Caledonian metamorphism, and studies of Upper Proterozoic carbonate sediments. The field investigations in 1997 were carried out during a seven week field season between early July and late August with participation of a total of 38 persons, including 32 geologists (Henriksen 1998). The work was supported by two helicopters and a small, fixed wing, Twin Otter aircraft, which operated from Mestersvig, a former airport which is kept open for limited special operations by the military sledge patrol Sirius. The GEUS group benefitted substantially from base facilities at Mestersvig, organised and manned by the Danish Polar Center (DPC). Transport between Mestersvig and Denmark was carried out by the Royal Danish Air Force (RDAF) using a C-130 Hercules aircraft.

scholarly journals GGU's photogeological laboratory: aerial photogrammetry – a valuable geological mapping tool in Greenland

1991 ◽  
Vol 152 ◽  
pp. 32-35
Author(s):  
G Hougaard ◽  
H.F Jepsen ◽  
J.K Neve
Keyword(s):  
Large Scale ◽  
Geological Mapping ◽  
Geological Survey ◽  
Aerial Photographs ◽  
Glacial Deposits ◽  
Large Scale Structures ◽  
Aerial Photogrammetry ◽  
Mapping Tool ◽  
Geological Features ◽  
Scale Structures

Geological mapping in Greenland is generally greatly helped by the use of vertical aerial photographs. Bedrock surfaces are normally well exposed, vegetation is sparse in most parts of the country and glacial deposits can be scattered or completely washed away. Consequently, geological features such as bedding, stratigraphical boundaries and large-scale structures are commonly visible on aerial photographs. Since its establishment in 1946 as an independent institution, the Geological Survey of Greenland (GGU) has made extensive use of aerial photographs during mapping campaigns, and photogeological interpretation has played an important role in Copenhagen during map compilation.

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