Analizando trayectorias de uso del suelo. Una propuesta de clusterización

Detalles Bibliográficos
Publicado en:	Geograficando. Vol. 19 No. 1 (2023),e130 19. Ensenada : Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Departamento de Geografía, 2023 Artículos
Autor Principal:	Rosati, Germán
Formato:	Artículo
Temas:	Uso del suelo Cambio de cobertura Frontera agraria Análisis de secuencias Land use Cover change Agrarian frontier Sequence analysis
Acceso en línea:	https://www.memoria.fahce.unlp.edu.ar/art_revistas/pr.16075/pr.16075.pdf https://www.geograficando.fahce.unlp.edu.ar/article/view/13238 10.24215/2346898Xe130
Resumen:	El trabajo presenta una alternativa metodológica para analizar trayectorias de uso de suelo. Toma como caso de estudio y prototipo un análisis de los cambios en el uso del suelo a un nivel general de Argentina (región pampeana, NEA, NOA y Cuyo). El objetivo es obtener un mapa con la mayor resolución posible que permita detectar las siguientes situaciones: 1) zonas recientes de expansión de frontera agraria; 2) zonas de agricultura "consolidada" y 3) zonas recientes de expansión de urbanización. Este trabajo se centra especialmente en el desarrollo de la metodología aplicada y en un primer intento de validación de la misma. A partir de datos de la Agencia Espacial Europea (ESA) vinculados a la "Climate Change Initiative-Land" (ESA-CCI-LC) del período 1992-2020 se genera una clusterización de trayectorias de uso del suelo mediante distancias de edición (utilizadas para el análisis de secuencias). Se obtuvieron 29 tipos de trayectorias a nivel píxel validadas por análisis visuales, con performance aceptable para la detección de diferentes trayectorias. This paper presents a methodological alternative to analyze land use trajectories. It takes as a case study and prototype an analysis of changes in land use at a general level in Argentina (the Pampas region, the Northwest, the Northeast, and Cuyo, excluding the Patagonia). The objective is to obtain a map with the highest possible resolution that allows to detect the following situations: 1) areas of recent agrarian frontier expansion; 2) areas of "consolidated" agriculture, and 3) areas of recent urban expansion. This paper focuses especially on the development of the applied methodology and a first attempt to validate it. Based on data from the European Space Agency (ESA) linked to the "Climate Change Initiative-Land" (ESA-CCI-LC) for the 1992-2020 period, a clustering of land use trajectories from distances is generated by means of editing distances (used for sequence analysis). There were 29 types of pixel-level trajectories obtained, validated by visual analysis, with an acceptable performance for detection of different trajectories.
Descripción Física:	p.e130
ISSN:	ISSN 2346-898X

MARC


LEADER	00000nab a2200000 a 4500
001	ARTI15944
008	230422s2023####\|\|\|#####\|#########0#####d
100			\|a Rosati, Germán \|u Escuela Interdisciplinaria de Altos Estudios Sociales (UNSAM-CONICET), Universidad Nacional de San Martín / Programa de Investigaciones sobre el Movimiento de la Sociedad Argentina, Argentina
245	1	0	\|a Analizando trayectorias de uso del suelo. Una propuesta de clusterización
246	3	3	\|a Analyzing land use trajectories. A clusterization proposal
041		7	\|2 ISO 639-1 \|a es
300			\|a p.e130
520	3		\|a El trabajo presenta una alternativa metodológica para analizar trayectorias de uso de suelo. Toma como caso de estudio y prototipo un análisis de los cambios en el uso del suelo a un nivel general de Argentina (región pampeana, NEA, NOA y Cuyo). El objetivo es obtener un mapa con la mayor resolución posible que permita detectar las siguientes situaciones: 1) zonas recientes de expansión de frontera agraria; 2) zonas de agricultura "consolidada" y 3) zonas recientes de expansión de urbanización. Este trabajo se centra especialmente en el desarrollo de la metodología aplicada y en un primer intento de validación de la misma. A partir de datos de la Agencia Espacial Europea (ESA) vinculados a la "Climate Change Initiative-Land" (ESA-CCI-LC) del período 1992-2020 se genera una clusterización de trayectorias de uso del suelo mediante distancias de edición (utilizadas para el análisis de secuencias). Se obtuvieron 29 tipos de trayectorias a nivel píxel validadas por análisis visuales, con performance aceptable para la detección de diferentes trayectorias.
653			\|a Uso del suelo
653			\|a Cambio de cobertura
653			\|a Frontera agraria
653			\|a Análisis de secuencias
520	3		\|a This paper presents a methodological alternative to analyze land use trajectories. It takes as a case study and prototype an analysis of changes in land use at a general level in Argentina (the Pampas region, the Northwest, the Northeast, and Cuyo, excluding the Patagonia). The objective is to obtain a map with the highest possible resolution that allows to detect the following situations: 1) areas of recent agrarian frontier expansion; 2) areas of "consolidated" agriculture, and 3) areas of recent urban expansion. This paper focuses especially on the development of the applied methodology and a first attempt to validate it. Based on data from the European Space Agency (ESA) linked to the "Climate Change Initiative-Land" (ESA-CCI-LC) for the 1992-2020 period, a clustering of land use trajectories from distances is generated by means of editing distances (used for sequence analysis). There were 29 types of pixel-level trajectories obtained, validated by visual analysis, with an acceptable performance for detection of different trajectories.
653			\|a Land use
653			\|a Cover change
653			\|a Agrarian frontier
653			\|a Sequence analysis
856	4	0	\|u https://www.memoria.fahce.unlp.edu.ar/art_revistas/pr.16075/pr.16075.pdf
952			\|u https://www.memoria.fahce.unlp.edu.ar/art_revistas/pr.16075/pr.16075.pdf \|a MEMORIA ACADEMICA \|b MEMORIA ACADEMICA
856	4	1	\|u https://www.geograficando.fahce.unlp.edu.ar/article/view/13238
856			\|u 10.24215/2346898Xe130
773	0		\|7 nnas \|t Geograficando. \|g Vol. 19 No. 1 (2023),e130 \|v 19 \|l 1 \|q e130 \|d Ensenada : Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Departamento de Geografía, 2023 \|x ISSN 2346-898X \|k Artículos
542	1		\|f Esta obra está bajo una licencia Creative Commons Atribución-NoComercial-CompartirIgual 4.0 Internacional \|u https://creativecommons.org/licenses/by-nc-sa/4.0/

foreach (glob($this->path . '/sess_*') as $filename) { if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); } } return true; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return true; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

Environment & details:

GET Data empty

POST Data empty

Files empty

Key	Value
VUFIND_SESSION	"1sa6voqk6n2nfk2q6gtrfuohm2"
language	"es"
ui	"standard"

Session

Key	Value
__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1738375030.8197 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "1sa6voqk6n2nfk2q6gtrfuohm2" ]`]
SessionState	Laminas\Stdlib\ArrayObject {#906}
FlashMessenger	Laminas\Stdlib\ArrayObject {#1507}
SessionHelper	Laminas\Stdlib\ArrayObject {#1661}

Server/Request Data

Key	Value
REDIRECT_VUFIND_ENV	"development"
REDIRECT_VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
REDIRECT_HTTPS	"on"
REDIRECT_SSL_TLS_SNI	"catalogo.bibliotecas.unlp.edu.ar"
REDIRECT_STATUS	"200"
VUFIND_ENV	"development"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"catalogo.bibliotecas.unlp.edu.ar"
HTTP_ACCEPT	"/"
HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
HTTP_COOKIE	"VUFIND_SESSION=1sa6voqk6n2nfk2q6gtrfuohm2; language=es; ui=standard"
HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"catalogo.bibliotecas.unlp.edu.ar"
PATH	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"
SERVER_SIGNATURE	"<address>Apache/2.4.52 (Ubuntu) Server at catalogo.bibliotecas.unlp.edu.ar Port 443</address>\n"
SERVER_SOFTWARE	"Apache/2.4.52 (Ubuntu)"
SERVER_NAME	"catalogo.bibliotecas.unlp.edu.ar"
SERVER_ADDR	"172.17.0.170"
SERVER_PORT	"443"
REMOTE_ADDR	"18.224.32.56"
DOCUMENT_ROOT	"/usr/local/vufind/public"
REQUEST_SCHEME	"https"
CONTEXT_PREFIX	""
CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"webmaster@bibliotecas.unlp.edu.ar"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
REMOTE_PORT	"48523"
REDIRECT_URL	"/Record/dhu.ARTI15944/Details"
GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
QUERY_STRING	""
REQUEST_URI	"/Record/dhu.ARTI15944/Details"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1738375030.809
REQUEST_TIME	1738375030

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Environment & details:

GET Data empty

POST Data empty

Files empty

Key	Value
VUFIND_SESSION	"1sa6voqk6n2nfk2q6gtrfuohm2"
language	"es"
ui	"standard"

Session

Key	Value
__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1738375030.8197 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "1sa6voqk6n2nfk2q6gtrfuohm2" ]`]
SessionState	Laminas\Stdlib\ArrayObject {#906}
FlashMessenger	Laminas\Stdlib\ArrayObject {#1507}
SessionHelper	Laminas\Stdlib\ArrayObject {#1661}

Server/Request Data

Key	Value
REDIRECT_VUFIND_ENV	"development"
REDIRECT_VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
REDIRECT_HTTPS	"on"
REDIRECT_SSL_TLS_SNI	"catalogo.bibliotecas.unlp.edu.ar"
REDIRECT_STATUS	"200"
VUFIND_ENV	"development"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"catalogo.bibliotecas.unlp.edu.ar"
HTTP_ACCEPT	"/"
HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
HTTP_COOKIE	"VUFIND_SESSION=1sa6voqk6n2nfk2q6gtrfuohm2; language=es; ui=standard"
HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"catalogo.bibliotecas.unlp.edu.ar"
PATH	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"
SERVER_SIGNATURE	"<address>Apache/2.4.52 (Ubuntu) Server at catalogo.bibliotecas.unlp.edu.ar Port 443</address>\n"
SERVER_SOFTWARE	"Apache/2.4.52 (Ubuntu)"
SERVER_NAME	"catalogo.bibliotecas.unlp.edu.ar"
SERVER_ADDR	"172.17.0.170"
SERVER_PORT	"443"
REMOTE_ADDR	"18.224.32.56"
DOCUMENT_ROOT	"/usr/local/vufind/public"
REQUEST_SCHEME	"https"
CONTEXT_PREFIX	""
CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"webmaster@bibliotecas.unlp.edu.ar"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
REMOTE_PORT	"48523"
REDIRECT_URL	"/Record/dhu.ARTI15944/Details"
GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
QUERY_STRING	""
REQUEST_URI	"/Record/dhu.ARTI15944/Details"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1738375030.809
REQUEST_TIME	1738375030

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Analizando trayectorias de uso del suelo. Una propuesta de clusterización

MARC

Ejemplares similares

Environment & details:

Environment & details: