Examinando por Autor "Upegui Cardona, Erika Sofia"
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Ítem Análisis de la Eficacia y del Comportamiento de los Errores en Posición Presentes en la Generación de Modelos Digitales de Elevación con Software Fotogramétrico Libre y Comercial, para una Zona de la Ciudad de Bogotá D.CCumbe Loaiza, Laura Camila; Roncancio Espinosa, Andrea Catalina; Upegui Cardona, Erika SofiaThis project focuses on the analysis and behavior of the error that was presented in two automatically made DEM from the software e-foto and ERDAS LPS, comparing them with reference information (12.5 m resolution ALOS-PALSAR DEM and geodetic control points), taking into account that the information and methods used for the construction of the DEM are the same in each software , so that the error caused by these factors does not influence or be a bias on DEM error in each software. A quantitative and qualitative analysis of the errors of the models was carried out when compared with the reference, in such a way that it was observed from these approaches which was the model that best adjusted to the references, under certain parameters.Ítem Análisis del procedimiento de los avalúos hipotecarios en Bogotá; estudio de caso Adarve e hijos LtdaPuerto Mahecha, Diego Orlando; Upegui Cardona, Erika Sofia; Molano Torres, Óscar AlfonsoIn recent years there has been a great growth of mortgage activity in Bogotá, this time once a company has been created that has been developed so that you can support these loans, but once there is no regulation for this activity. This project starts with this premise and is based on carrying out an analysis and development of the procedures, the mortgage appraisals in Bogotá, the study of the specific case of the firm Adarve e hijos Ltda; consolidated for more than 10 years of relationship, with banking entities such as Banco Caja Social, Cooperativa Financiera JFK, and Cavipetrol. This is a development project according to an analysis of the demand for this activity, in the period from January 2018 to February 2019, where the growth and efficiency of this process is observed within the company. This work is based on the knowledge acquired in the firm adarve e hijos Ltda; and in the Universidad Distrital Francisco José de Caldas, taking into account this time, agreement 038 of 2015, where the option of the internship is established as a degree project, for the title of cadastral engineer and geodesta. With this, you can observe the development of the firm's product, its influence on the mortgage market, and vice versa, as well as its growth around it. Observing strengths, and shortcomings, in the way in which the company develops this productive activity for the project, taking into account some conclusions explored, with the corresponding analysis and results. Finally, within the project, it is a sample of the mortgage activity, developed in the firm Adarve e hijos Ltda, in order of observing its procedure, periods of realization and analysis, as well as quality control and guarantee, as they serve as an incentive, for the development of a specific norm for this activity, increasingly appropriate.Ítem Análisis espacial de islas de calor en la ciudad de Bogotá: los efectos de la urbanización, un estudio desde la teledetección.Salas Pérez, Cristian; Coy Castro, Daniel Felipe; Upegui Cardona, Erika SofiaClimate change represents one of the greatest challenges facing humanity today, demanding changes in social, economic and environmental behaviour. Cities are home to the majority of the world's population and are major centres of consumption, demanding excessive amounts of natural resources and services, making them possibly the agents that are generating the greatest pollution and environmental threat to the planet. The effects of climate change in the urban context are currently being investigated in the world, since the city is the place to which climate change and sustainable development have put the greatest challenge; opting for environmentally and socially viable growth or the modern city will be at risk for its own development. Within the context of climate change a local phenomenon of temperature variation known as heat islands arises, which seems to have an inherent behavior to the processes of urbanization in a city and together with a global climate change could put at risk the quality of life of the inhabitants of an urban center, it is known that since a couple of decades ago the terrestrial temperature has had an increase by human activities, now the phenomenon of heat islands can be generated from an urban microclimate with increases in surface temperature in relation to changes in land use and a not very timely spatial configuration of the city. Bogotá, as one of the most populated cities in Latin America and with a particular history of urban development, is no stranger to this phenomenon. From the José Celestino Mutis Botanical Garden in Bogotá, the need arises to monitor this phenomenon and from the GRSS research seedbed, this research is formulated in which a multi-temporal analysis is carried out in the city of Bogotá of the change in land use over the last 30 years, using remote sensing tools such as supervised object-oriented classification or the calculation of spectral indices, it is possible to extract information from the surface and the variation of the soil over time. The supervised classification determines an increase of $19% in urbanization and a decrease of 57% in the city's green areas in the last 29 years, which presents a high correlation with the increase in soil temperature. Monitoring the temperature of the city from the Landsat data is an increase in soil temperature in areas with high density of urbanization, this was proven by performing an exploratory analysis, demonstrating on the one hand that the temperature of the city is not randomly distributed but presents temperature patterns known as islands of heat, on the other hand also statistically through the local Moran Bivariado index corroborates that urban soil affects the increase in surface temperature while green areas can act as a mitigating factor. In order to quantify the effect of vegetation and urban soil, a SARAR spatial model was performed using surface temperature as the response variable and NDVI and NDBI spectral indices as independent variables, the results confirmed the theory and complement the processes developed in this research by determining that urban soil can increase soil temperature by 20º C and that vegetation could decrease it by 13º C. This is how this research confirms the presence of heat islands in the city of Bogota and quantifies the alterations that can generate urban cover in the variation of soil temperature.\\ The surface temperature of 14 satellite images was calculated from the Google Earth Engine platform, with a time period from 1985 to 2018, correcting the gaps in the ETM+ images. This allowed to have a temporal series of very valuable temperature data, to which the values of average and fashion of temperature were calculated, these were correlated with the data that describe the phenomenon Niña and Niño. Using Pearson's coefficient for this correlation it was found that these data have a relation of -0.30 which means that the soil temperature has a low relation with the regional climate. This result demonstrates that in the city of Bogotá an urban micro climate is being conformed, influenced by urbanization processes that are heating the soil and forming patterns of heat islands. This research was developed in two general phases; the first phase consisted in the extraction of soil information from satellite images, processes such as supervised classification, calculation of spectral indices and soil temperature were the data for statistical analysis, being this the second phase, which consisted in analyzing the spatial temperature clusters and those associated with the relationship of temperature with vegetation parameters and urban soil, in a confirmatory way a spatial model was calculated to quantify the effects of land use change. This research shows that from remote sensing data it is possible to monitor an urban climatic phenomenon such as heat islands that is currently a topic of great relevance for urban planning.Ítem Análisis y generación de información geográfica para apoyo al cálculo de indicadores de desarrollo sostenible a partir de fuentes no tradicionales de informaciónCamargo Castellanos, Cristian Johan; Upegui Cardona, Erika SofiaThe SDG 11.2.1 indicator is the proportion of the population that has convenient access to public transport stops, it was developed in this project, in which a pilot plan for 4 municipalities in Colombia was carried out. Additionally, this indicator was complemented with the issue of decent housing defined by DANE, in search of the proportion of population that has convenient access to parks, green areas, schools, universities, police stations and health centers at a distance of 500 meters. Additionally, with the service areas tool, it was possible to establish the service areas of the equipment and with it is through an intersection geoprocessing the proportion of the population that has convenient access to the aforementioned equipment of the municipalities of Medellín, Bogotá DC, Cali and Montería but beforehand an analysis of road networks and a comparison of service areas vs proximity analysis was performed in order to give more support to the results.Ítem Analizar los factores que influyen en el cambio del valor comercial de un predio, entre el estudio de zona s homogeneas geoeconómicas y avalúos comerciales puntuales en el caso concesión Víal Ruta al Mar. unidad funcional 6 - 2Perilla Martinez, Jhon Sebastian; Upegui Cardona, Erika SofiaThis document aims to analyze the factors that influence the change in the commercial value of a property, between the study of homogeneous geoeconomic zones and specific commercial evaluations in the case of the Ruta al Mar road concession. functional unit 6 - 2, through the specific regulations that address the issue of appraisals, this with the implementation of resolution 620 of 2008 that refer to specific appraisal methods, decree 1420 of 1998, which determines the way of acquisition of the property, this contains the parameters that the homogeneous geoeconomic zones or sub-zones must have. All in order to establish the factors that influence the change in value. However, the statistical analysis of the database carried out with the point evaluations is carried out using the R 5.3.3 software. with which the linear regression model is sought, which must meet the normality and heteroscedasticity tests to determine a correct statistical inference. Having the most optimal model, the significant variables are reviewed and the value predictions are made with the obtained model, in order to compare these values with those obtained through the homogeneous geoeconomic zones.Ítem Desarrollo e implementación del modulo geoportal para la atención del proceso catastral multipropósito de la Agencia Catastral de CundinamarcaBautista Rengifo, Laydi Viviana; Upegui Cardona, Erika Sofia; Sánchez Gonzáles, Jonny CarlosThe Geoportal module of the Agencia Catastral de Cundinamarca is a platform that facilitates access to cadastral information for external consultation of physical information and base mapping under the LADM_COL Model of the municipalities in its jurisdiction, allowing the entity as a cadastral operator to comply with the cadastral diffusion process that is part of the public service of the multipurpose cadastre. In this document, the results of the stage of gathering requirements, development and implementation of the first version of the Geoportal Module under PostgreSQL/Postgis, Python/Django and Angular/Leaflet free software technologies. In addition, an implementation test is carried out with the OpenLayers library, finally concluding that OpenLayers is better according to the requirements of the entity and making recommendations for future functionalities that can be implemented in a future version of the Geoportal.Ítem Evaluación del desempeño de la teledetección para estimar niveles de Clorofila-a: estudio de caso en la laguna de Tota usando recursos de acceso libreGarcía Fernández, Jhoan Manuel; Moreno Moreno, Yuli Daniela; Upegui Cardona, Erika SofiaThe Sentinel mission, developed by the European Space Agency (ESA), consists of a series of satellites designed to collect vast amounts of data, which are then transformed into images and information used in the European Commission's Copernicus program. This document proposes a methodology to determine chlorophyll-a levels using satellite images obtained from Sentinel-2, processed with the SNAP software, also developed by the ESA. The selected study area is Laguna de Tota, located in the department of Boyacá, Colombia, a region of interest due to environmental issues associated with onion crops along its shores, where poor environmental management has been identified. The results were obtained through the application of various algorithms, including CR2CC within the SNAP software. However, when these results were compared with in-situ samples, a lack of correlation was observed, prompting further analysis that considered temporal factors, the specific characteristics of water bodies, among other variables. After processing with eight different algorithms, it was concluded that none of the models corresponded or closely matched the actual field-measured values, as these models are empirical and directly influenced by the physical characteristics of each water body. Finally, a model was developed using linear regression, combining field data with the digital levels of the 13 satellite bands. This model proved to be significantly reliable both globally and individually, with a confidence level of 89%.Ítem Metodología para la estimación de flujo de calor geotérmico a Partir de Imágenes satelitales Landsat 8-OLI-TIRS en la cuenca sedimentaria Llanos OrientalesPáez Cuervo, Anamaria; Kaligari Torres, Valentina; Upegui Cardona, Erika SofiaThis document presents a methodology that allows estimating the geothermal heat flux (GHF) in the Llanos Orientales sedimentary basin classified as a low and / or medium enthalpy area, based on the digital processing of Landsat 8-OLI-TIRS satellite images, Using thermal infrared (TIRS) as the main input, with which products such as the earth's surface temperature (LST) and vegetation indices (NDVI) are obtained, which, related to digital elevation models, were implemented to obtain the ambient temperature of the area. of study and likewise, the calculation of the solar radiation of the area. Said climatological and topographic variables are of great importance since, when combined during processing, they eliminate errors in the images due to cloudiness or high solar incidence in the scene. The methodology allows to identify points with temperature anomalies that determine areas of potential geothermal exploitation, whose results obtained a high positive correlation with respect to the information obtained from the Colombian Geological Service (SGC).Ítem Seguimiento a la inundación ocurrida durante la ola invernal en el año 2010 sobre las coberturas vegetales identificables en el Municipio de Santa Cruz de Mompós utilizando imágenes del sensor PALSAR del satélite ALOSValencia Mora, Brian Steven; Upegui Cardona, Erika SofiaThe capabilities of satellite systems with active sensors, such as synthetic aperture radars (SAR), to acquire information from the earth's surface in almost any weather condition and the continuous observation of an event, allow flood identification and track them. With these data, the behavior of the flood can be determined as a result of the propagation of its waters to non-flooded areas which can be obtained with the use of SAR images in different periods of time. In this work, the plant cover that was affected as a result of this natural disaster occurred in the Santa Cruz de Mompós municipality, located in the Bolívar department, Colombia, was identified during the second half of 2010 in which the beginning of the the Niña phenomenon, thus generating 3 thematic maps of land cover based on 6 dual pol HH / HV SAR images of PALSAR sensor of ALOS satellite, for the dates of June 13, July 29 and October 29 2010 through the use of supervised classifications using digital image processing applied in SNAP and PCI Geomatica software. Subsequently, the affected areas by the flood are obtained using a geographic information systems approach within the ArcGIS software based on multitemporal analysis, for which the propagation of flood waters is determined and the areas affected by each vegetation cover between each observation period.