GuidosToolbox: universal digital image object analysis

Vogt, Peter; Riitters, Kurt H.

doi:10.1080/22797254.2017.1330650

Cited by 209 publications

(111 citation statements)

References 33 publications

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“…We used a moving window of 51 × 51 pixels (corresponding to an area of about 2.34 km 2 ) centered on each forest pixel to compute the percentage of forest pixels in the neighborhood. We used this percentage as an indication of the forest fragmentation (Riitters & Wickham, 2012; Vogt & Riitters, 2017). The size of the moving windows was based on a compromise: a sufficiently high number of cells (here 2601) had to be considered to be able to compute a percentage and a reasonably low number of cells had to be chosen to have a local estimate of the fragmentation.…”

Section: Methodsmentioning

confidence: 99%

Combining global tree cover loss data with historical national forest-cover maps to look at six decades of deforestation and forest fragmentation in Madagascar

Vieilledent

Grinand

Rakotomalala

et al. 2017

Preprint

181

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Section: Methodsmentioning

confidence: 99%

Combining global tree cover loss data with historical national forest-cover maps to look at six decades of deforestation and forest fragmentation in Madagascar

Vieilledent

Grinand

Rakotomalala

et al. 2017

Preprint

181

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“…Urban areas and water bodies extents were obtained directly from the CLC dataset. Forest core was determined from CLC forest classes using Morphological Spatial Pattern Analysis (MSPA) (Soille and Vogt, 2009) implemented in the GuidosToolbox software (Vogt, 2016). MSPA is a sequence of mathematical morphological operations that allow to classify geometrical properties of discrete patches or their parts in a raster thematic layer.…”

Section: Sampling Strategy Developmentmentioning

confidence: 99%

Mapping Secondary Forest Succession on Abandoned Agricultural Land in the Polish Carpathians

Kolecka¹,

Kozak²,

Kaim³

et al. 2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Land abandonment and secondary forest succession have played a significant role in land cover changes and forest cover increase in mountain areas in Europe over the past several decades. Land abandonment can be easily observed in the field over small areas, but it is difficult to map over the large areas, e.g., with remote sensing, due to its subtle and spatially dispersed character. Our previous paper presented how the LiDAR (Light Detection and Ranging) and topographic data were used to detect secondary forest succession on abandoned land in one commune located in the Polish Carpathians by means of object-based image analysis (OBIA) and GIS (Kolecka et al., 2015). This paper proposes how the method can be applied to efficiently map secondary forest succession over the entire Polish Carpathians, incorporating spatial sampling strategy supported by various ancillary data. Here we discuss the methods of spatial sampling, its limitations and results in the context of future secondary forest succession modelling.

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“…Foreground Area Density (FAD), a spatial fragmentation measure, was calculated in 20 m buffers from high spatial resolution classifications around the three Krensen creeks with the GUIDOS Toolbox (Vogt and Riitters 2017). Twenty meters is the upper limit of the recommended buffer zone width in Ghana for minor perennial streams (Ministry of Water Resources Works and Housing 2013).…”

Section: Methodsmentioning

confidence: 99%

“…Results are classified into six classes: < 10% (rare), 10-39% (patchy), 40-59% (transitional), 60-89% (dominant), 90-99% (interior), 100% (intact). The proportion of the six FAD classes was calculated for the buffers as the average from the five observation scales (Vogt and Riitters 2017).…”

Section: Methodsmentioning

confidence: 99%

Habitat loss in the restricted range of the endemic Ghanaian cichlid Limbochromis robertsi

Lamboj

Lucanus

Darko

et al. 2019

Preprint

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Remote sensing, through satellite image analysis has become an integral and invaluable tool to inform biodiversity conservation and monitoring of habitat degradation and restoration over time. Despite the disproportionately high levels of biodiversity loss in freshwater ecosystems worldwide, ichthyofauna are commonly overlooked in favor of other keystone species.Freshwater fish, as indicators of overall aquatic ecosystem health can also be indicators of larger scale problems within an ecosystem. If endemic and specialized fishes are at risk, the forest and landscape around their habitat is also undergoing change. As a case study demonstrating the utility of multi-temporal, multi-resolution satellite imagery, we examined deforestation and forest fragmentation around the Atewa Forest Reserve, south eastern Ghana. Within small creeks, Limbochromis robertsi, a unique freshwater cichlid with an extremely limited distribution range can be found. Historically, the land cover in the area has undergone substantial deforestation for agriculture and artisanal small-scale mining, primarily for gold. We found deforestation accelerated along with increased forest fragmentation in the 2014 -2017 period with the majority of the forest loss along the river and creek banks due to small-scale mining operations and increased agriculture. Field visits indicate a decrease in the total population by approximately 90% from the early 1990s to 2018. We illustrate the benefits of determining landscape metrics from local scale remote sensing studies as proxies to assess the decline of endemic species with restricted ranges, whose habitat characteristics and the subsequent pressures they face require detailed analysis at fine temporal and spatial scales not captured by global or continental scale datasets.

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GuidosToolbox: universal digital image object analysis

Cited by 209 publications

References 33 publications

Combining global tree cover loss data with historical national forest-cover maps to look at six decades of deforestation and forest fragmentation in Madagascar

Combining global tree cover loss data with historical national forest-cover maps to look at six decades of deforestation and forest fragmentation in Madagascar

Mapping Secondary Forest Succession on Abandoned Agricultural Land in the Polish Carpathians

Habitat loss in the restricted range of the endemic Ghanaian cichlid Limbochromis robertsi

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