{"id":8060,"date":"2019-02-11T01:10:27","date_gmt":"2019-02-11T00:10:27","guid":{"rendered":"http:\/\/www.sigterritoires.fr\/?p=8060"},"modified":"2019-02-12T08:14:58","modified_gmt":"2019-02-12T07:14:58","slug":"quantum-gis-flying-high","status":"publish","type":"post","link":"https:\/\/www.sigterritoires.fr\/index.php\/en\/quantum-gis-flying-high\/","title":{"rendered":"Quantum GIS \u2013 flying high"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The story of Quantum GIS (QGIS) begins in 2002 under the leadership of Gary Sherman who wanted to have a GIS viewer on Linux .At its origin, it was intended to be a GRASS data visualization tool . Nowadays , this project is supported by OSGEO and has, considerably, evolved and offers features close to commercial GIS while being usable on most platforms (Windows, Mac, Linux\n&#8230;). This\nGIS has developed very many features . Quantum GIS has the particularity to pursue a parallel development with GRASS using of its graphic features.<\/p>\n\n\n\n<!--more-->\n\n\n\n<p class=\"wp-block-paragraph\">Installation <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The installation is simple, it is performed in a classic way, downloading &nbsp;the Quantum website. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Access to data <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Although originally designed as a simple viewer for <a href=\"https:\/\/www.sigterritoires.fr\/index.php\/en\/starting-with-postgres-postgis\/\">PostGis<\/a> , QGIS relies on the GDAL-OGR library to, considerably, develop the list of accessible data formats for reading and \/ or writing . <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">QGis works with both types of GIS data main features: data vector ( representation of geographical entities such as point, line, area &#8230;) and\nraster data (representative of a territory in the form of pixels, as an aerial photo , a digital terrain model, etc &#8230;). <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At vectors level this listing accounts for nearly thirty formats including: ESRI <a href=\"https:\/\/www.sigterritoires.fr\/index.php\/en\/shapefile-vs-geopackage\/\">shapefile<\/a>, FMEObjects Gateway, File MapInfo, Oracle\nSpatial, PostgreSQL, SQLite, WFS &#8230; <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At raster level the list is much longer since it counts with more than fifty formats including : Arc \/ Info ASCII Grid,\nECW, TIFF, GeoTIFF,\nOGC WCS and\nWMS, USGS SDTS DEM &#8230; <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">QGIS is the only one that allows access in native form (without transformation\nof the format) to so many data sources . When using QGIS, this flexibility is really handy since it is no longer necessary to convert data format before you can check them. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This flexibility is, also, found when exporting data. It is, as well, possible to convert these later by, simply, using the option \u201cSave as &#8230;\u201d &nbsp; <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Features <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The available QGis featuress can be divided in two categories : <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0095 features available in the software core <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0095 features available by adding \u00a0\u00bb &nbsp; plugins &nbsp; \u00a0\u00bb <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Among the first type, all the basic functions of a desktop GIS: creation and modification of data, data representation,\ncomposition and printing cards, &#8230; are included.<br>\nThe second type allows the realization of evolved features, and, also, the integration of very powerful data and services: display of google maps as base map, georeferencing , images tessellate\nand cutting , etc. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>The story of Quantum GIS (QGIS) begins in 2002 under the leadership of Gary Sherman who wanted to have a GIS viewer on Linux .At its origin, it was intended to be a GRASS data visualization&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"sfsi_plus_gutenberg_text_before_share":"","sfsi_plus_gutenberg_show_text_before_share":"","sfsi_plus_gutenberg_icon_type":"","sfsi_plus_gutenberg_icon_alignemt":"","sfsi_plus_gutenburg_max_per_row":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1260],"tags":[],"class_list":["post-8060","post","type-post","status-publish","format-standard","hentry","category-non-classe-en"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p6XU0A-260","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/posts\/8060","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/comments?post=8060"}],"version-history":[{"count":0,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/posts\/8060\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/media?parent=8060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/categories?post=8060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sigterritoires.fr\/index.php\/wp-json\/wp\/v2\/tags?post=8060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}