scholarly journals Digital Mapping in Polar Regions from Landsat Photographic Products: A Case Study

1986 ◽  
Vol 8 ◽  
pp. 47-50 ◽  
Author(s):  
J.A. Dowdeswell ◽  
A.P.R. Cooper
Keyword(s):  
Control Point ◽  
Image Interpretation ◽  
Production Method ◽  
Polar Regions ◽  
Landsat Images ◽  
Map Projections ◽  
Digital Mapping ◽  
Ice Cap ◽  
Ground Control Points

Landsat photographic products on the Space Oblique Mercator (SOM) projection are used to construct a map of Nordaustlandet (Svalbard), of known accuracy. The map includes ice divides. Accurately enlarged Landsat images were digitized. Combined digitizer and operator errors were 64 m, at the enlargement scale. Fifteen ground control points rixed the two scenes. RMS errors in control point identification were <123 m. Geographical coordinates were extracted by: 1) converting digitizer coordinates to SOM cartesian coordinates and 2) transforming these coordinates to latitude and longitude. This map production method is applicable to any imagery of known projection. The digitally stored map may be plotted on a variety of map projections and scales. Two problems in image interpretation were: I) shadows obscuring detail on NNE-facing coasts and 2) summer snow cover obscuring parts of the terrestrial ice cap margins, The map is similar to an east coast map produced from Landsat computer compatible tapes. Differences between the Landsat map and a 1:50 000-scale aerial photograph were <100 m.

scholarly journals Digital Mapping in Polar Regions from Landsat Photographic Products: A Case Study

1986 ◽  
Vol 8 ◽  
pp. 47-50 ◽  
Author(s):  
J.A. Dowdeswell ◽  
A.P.R. Cooper
Keyword(s):  
Control Point ◽  
Image Interpretation ◽  
Production Method ◽  
Polar Regions ◽  
Landsat Images ◽  
Map Projections ◽  
Digital Mapping ◽  
Ice Cap ◽  
Ground Control Points

Landsat photographic products on the Space Oblique Mercator (SOM) projection are used to construct a map of Nordaustlandet (Svalbard), of known accuracy. The map includes ice divides. Accurately enlarged Landsat images were digitized. Combined digitizer and operator errors were 64 m, at the enlargement scale. Fifteen ground control points rixed the two scenes. RMS errors in control point identification were &lt;123 m. Geographical coordinates were extracted by: 1) converting digitizer coordinates to SOM cartesian coordinates and 2) transforming these coordinates to latitude and longitude. This map production method is applicable to any imagery of known projection. The digitally stored map may be plotted on a variety of map projections and scales. Two problems in image interpretation were: I) shadows obscuring detail on NNE-facing coasts and 2) summer snow cover obscuring parts of the terrestrial ice cap margins, The map is similar to an east coast map produced from Landsat computer compatible tapes. Differences between the Landsat map and a 1:50 000-scale aerial photograph were &lt;100 m.

Assets-based approaches to developing age friendly communities: learning from the bristol ageing better programme

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Amy Beardmore ◽  
Penny Beynon ◽  
Christine Crabbe ◽  
Carol Fry ◽  
Jan Fullforth ◽  
...  
Keyword(s):  
Community Development ◽  
Older People ◽  
Production Method ◽  
Project Delivery ◽  
Development Projects ◽  
Practical Application ◽  
Content Type ◽  
Diverse Groups ◽  
Practical Implications

Purpose International attention is increasingly turning to the challenge of creating age-friendly environments. This study aims to examine the application of asset-based approaches in undertaking community development projects with older people. The paper intends to share the learning that may be useful when designing community development projects for older people in the future. Design/methodology/approach This study followed a multiple project case study design, with a focus on project delivery practices. It was undertaken as a co-production exercise involving university researchers and trained older volunteer community researchers (CRs). Over 18–24 months of qualitative research was conducted in relation to six area-based urban projects between 2018 and 2020. Findings There were five leading themes as follows: mapping and building on assets in highly localised settings; creating governance and direction through steering groups; developing activities with diverse groups of older people; reaching isolated and lonely older people; building local capacity to embed sustainability. Practical implications The effectiveness of assets-based approaches in promoting age-friendly agendas appears to be contingent on the values, skills, capacity and resourcing of delivery agencies, alongside wider public sector investment in communities. Diversity and inequalities amongst older people need to be taken into account and community development that specifically focuses on older people needs to be balanced with the whole population and intergenerational practice. Originality/value This paper provides an empirical account of the practical application of assets practices specifically in the context of the age-friendly community agenda. The co-production method brings together insights from academic and volunteer older CRs.

scholarly journals Glaciological Investigations of the Tropical Quelccaya Ice Cap, Peru

1980 ◽  
Vol 25 (91) ◽  
pp. 69-84 ◽  
Author(s):  
Lonnie G. Thompson
Keyword(s):  
Rainy Season ◽  
Ice Core ◽  
Ice Cores ◽  
Dry Season ◽  
Radioactive Material ◽  
Polar Regions ◽  
Near Surface ◽  
Ice Cap ◽  
Activity Measurements ◽  
Quelccaya Ice Cap

AbstractGlaciological results of the continuing investigations of the Quelccaya ice cap located at lat. 13° 56’ S., long. 70° 50’ W., in the Cordillera Oriental of southern Peru are presented. Ice cores to a depth of 15 m have been retrieved from the summit dome (5650 m), middle dome (5543 m), and south dome (5480 m) and sampled in detail for microparticle, oxygen-isotope, and total-β-activity measurements. Results of these core analyses indicate that although the summit of this ice cap is only 300 m above the annual snow line and the firn is temperate, an interpretable stratigraphic record is preserved. The marked seasonal ice stratigraphy is produced by the marked seasonal variation in regional precipitation. High concentrations of microparticles and β- radioactive material occur during the dry season (May-August). Microparticles deposited during the rainy season are larger than those deposited during the dry season. On the Quelccaya ice cap the most negative δ18O values occur during the warmer rainy season (the opposite occurs in polar regions). The near-surface mean δ value of – 21‰ is remarkably low for this tropical site where the measured mean annual air temperature is – 3°C The seasonality of the microparticles, total β activity, and isotope ratios offers the prospect of a climatic ice-core record from this tropical ice cap.

scholarly journals Recession of the southern part of Barnes Ice Cap, Baffin Island, Canada, between 1961 and 1993, determined from digital mapping of Landsat TM

1997 ◽  
Vol 43 (143) ◽  
pp. 98-102 ◽  
Author(s):  
John D. Jacobs ◽  
Élizabeth L. Simms ◽  
Alvin Simms
Keyword(s):  
Regional Climate ◽  
Landsat Tm ◽  
Early 20Th Century ◽  
Baffin Island ◽  
Digital Mapping ◽  
Ice Cap ◽  
Significant Difference ◽  
Southern Half ◽  
Landsat Tm Imagery ◽  
General Reduction

AbstractChanges along the margin of the southern half of the 5900 km2 Barnes Ice Cap have been assessed using 1993 Landsat TM imagery in comparison with digitized 1:50 000 NTS maps based on 1961 photogrammetry. The average recession over the 183 km long southern perimeter was found to be at least 4 m a−1, with no significant difference between the southeast and southwest sectors. Viewed in conjunction with the sustained retreat previously reported for the northwest margin, these results indicate that a general reduction in the size of Barnes Ice Cap is occurring. The present retreat phase began under a regional climate warming in the late 19th to early 20th century period and continues, while the record of the ablation-season temperature since the mid-century has not shown any significant trend.

Ionospheric scintillation threats to GNSS in polar regions: The DemoGRAPE case study in Antarctica

2016 ◽  
Author(s):  
Nicola Linty ◽  
Rodrigo Romero ◽  
Calogero Cristodaro ◽  
Fabio Dovis ◽  
Michele Bavaro ◽  
...  
Keyword(s):  
Ionospheric Scintillation ◽  
Polar Regions

scholarly journals The Strategy of Salt Business Development: A Case Study in Sumenep, Indonesia

2021 ◽  
Vol 226 ◽  
pp. 00036
Author(s):  
Rika Diananing ◽  
Amilia Destryana ◽  
Ribut Santosa ◽  
Noor Illi Mohamad Puad ◽  
Agustine Christela Melviana
Keyword(s):  
Development Strategy ◽  
Business Strategy ◽  
Swot Analysis ◽  
Management Strategies ◽  
Business Management ◽  
Production Method ◽  
Technology Application ◽  
Cooperation Strategy

Sumenep is one of the salt producers in Indonesia. The problem experienced by farmers is the production of salt using evaporation by solar energy that depends on the weather and the low price, caused by worse business management. Salt is a potential commodity, because its market is still wide open. This research aims to develop the salt production method and development strategy of salt business in Sumenep Regency by using SWOT analysis. The result of the analysis concludes that the priority of salt development business strategy in Sumenep Regency are: i) Geoisolator technology application strategy to produce good quality of salt; ii) cooperation strategy in group mechanism to build power and increasing the bargaining value of the farmers; iii) capital strengthening strategy through partner cooperatives; iv) broader marketing management management strategies to industrial salt user sectors.

Integration of Satellite Remote Sensing Techniques and Landscape Metrics to Characterize Land Cover Change and Dynamics

2013 ◽  
pp. 228-244
Author(s):  
Carmelo Riccardo Fichera ◽  
Giuseppe Modica ◽  
Maurizio Pollino
Keyword(s):  
Remote Sensing ◽  
Land Cover ◽  
Landscape Metrics ◽  
Landsat Images ◽  
Aerial Photos ◽  
Multi Temporal ◽  
Urban Rural ◽  
Remote Sensing Techniques

One of the most relevant applications of Remote Sensing (RS) techniques is related to the analysis and the characterization of Land Cover (LC) and its change, very useful to efficiently undertake land planning and management policies. Here, a case study is described, conducted in the area of Avellino (Southern Italy) by means of RS in combination with GIS and landscape metrics. A multi-temporal dataset of RS imagery has been used: aerial photos (1954, 1974, 1990), Landsat images (MSS 1975, TM 1985 and 1993, ETM+ 2004), and digital orthophotos (1994 and 2006). To characterize the dynamics of changes during a fifty year period (1954-2004), the approach has integrated temporal trend analysis and landscape metrics, focusing on the urban-rural gradient. Aerial photos and satellite images have been classified to obtain maps of LC changes, for fixed intervals: 1954-1985 and 1985-2004. LC pattern and its change are linked to both natural and social processes, whose driving role has been clearly demonstrated in the case analysed. In fact, after the disastrous Irpinia earthquake (1980), the local specific zoning laws and urban plans have significantly addressed landscape changes.

Learning Objects in Hybrid Teaching Potential and Challenges for Their Use in the Context of Brazilian Education

2021 ◽  
pp. 282-309
Author(s):  
Daiana Garibaldi da Rocha ◽  
Adriana Cardoso
Keyword(s):  
Higher Education ◽  
Distance Education ◽  
Educational Technology ◽  
Higher Education Institutions ◽  
Production Method ◽  
Learning Objects ◽  
Digital Resources ◽  
Hybrid Teaching

In the context of distance education, one aspect materialized by educational technology is through the use of learning objects (LO). These elements can be defined as educational digital resources that favor students' interaction with many languages and different media. This chapter aims to present two scenarios. The first one involves a case study about the production of didactic content. This study will focus on teaching and will consist of showing the rationale behind the content production method used by the company and the methodology used in the construction of learning objects in the context of a learning unit. The second scenario will consist of students' views by means of a survey conducted with more than 4 thousand students from higher education institutions (HEIs) from different regions of Brazil who consume the content and make use of the learning objects. The reflections point to the pedagogical potential of learning objects but also to concerns in view of great challenges posed by hybrid teaching within the Brazilian scenario.

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