{"id":3490,"date":"2018-12-12T22:36:13","date_gmt":"2018-12-12T21:36:13","guid":{"rendered":"https:\/\/topo4d.be\/as-built-surveys-and-grb\/"},"modified":"2026-07-17T10:05:09","modified_gmt":"2026-07-17T08:05:09","slug":"as-built-surveys-and-grb","status":"publish","type":"post","link":"https:\/\/topo4d.be\/en\/as-built-surveys-and-grb\/","title":{"rendered":"As-built surveys and GRB"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"3490\" class=\"elementor elementor-3490 elementor-2554\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7290723 e-flex e-con-boxed e-con e-parent\" data-id=\"7290723\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7c8de42 elementor-widget elementor-widget-heading\" data-id=\"7c8de42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">As-built surveys and GRB<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b5e5285 e-flex e-con-boxed e-con e-parent\" data-id=\"b5e5285\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f941fca elementor-widget elementor-widget-text-editor\" data-id=\"f941fca\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In an <a href=\"https:\/\/topo4d.be\/landmeter\/\"><strong>as-built survey<\/strong><\/a>, <strong>how a project was actually built<\/strong> is recorded after the works have been completed. These measurements provide a correct and up-to-date representation of the realized state and form an important link between execution, administration, and spatial planning. <\/p>\n<p>In this article, we explain what as-built surveys are and how they relate to the <strong>Large-scale Reference Database (GRB)<\/strong>.<\/p>\n<h2>What are as-built surveys?<\/h2>\n<p>As-built surveys are accurate measurements of a construction or infrastructure <strong>after the works have been completed<\/strong>. These record, among other things: <\/p>\n<ul>\n<li>location and dimensions of buildings<\/li>\n<li>foundations and structural elements<\/li>\n<li>pipes, utilities, and paving<\/li>\n<li>deviations from the original design<\/li>\n<\/ul>\n<p>The goal is not to design, but to <strong>objectively record what has actually been realized.<\/strong><\/p>\n<h2>Why are as-built surveys important?<\/h2>\n<p><strong>Quality control<\/strong> <br\/>As-built plans demonstrate whether the execution complies with the approved plans and permits.<\/p>\n<p><strong>Correct documentation<\/strong> <br\/>They form a reliable basis for future maintenance, renovations, or expansions.<\/p>\n<p><a href=\"https:\/\/topo4d.be\/en\/condition-reports\/\"><strong>Legal and administrative value<\/strong> <\/a><br\/>As-built surveys can serve as evidence for:<\/p>\n<ul>\n<li>permit files<\/li>\n<li>assessments<\/li>\n<li>disputes or regularizations<\/li>\n<\/ul>\n<h2>What is the GRB?<\/h2>\n<p>The <strong>Large-scale Reference Database (GRB)<\/strong> is a digital base file used in Flanders for spatial data. It includes information on: <\/p>\n<ul>\n<li>buildings<\/li>\n<li>parcels<\/li>\n<li>roads and infrastructure<\/li>\n<li>waterways and public domain<\/li>\n<\/ul>\n<p>Governments and utility companies use the GRB as a <strong>reference for planning, management, and policy<\/strong>.<\/p>\n<h2>The connection between as-built and GRB<\/h2>\n<p>As-built surveys often form the <strong>source data<\/strong> for updating the GRB. When new buildings, roads, or infrastructure are realized, as-built plans ensure that: <\/p>\n<ul>\n<li>digital maps correspond to reality<\/li>\n<li>spatial data remains up-to-date<\/li>\n<li>property and infrastructure information is correctly managed<\/li>\n<\/ul>\n<p>In this way, the as-built survey forms the bridge between <strong>on-site execution<\/strong> and <strong>digital spatial databases.<\/strong><\/p>\n<h2>How are as-built surveys performed?<\/h2>\n<p>Depending on the project, this can be done using:<\/p>\n<ul>\n<li>a <strong>total station<\/strong> for high accuracy<\/li>\n<li><a href=\"https:\/\/topo4d.be\/en\/drone-survey\/\"><strong>drone surveys<\/strong><\/a> for larger or hard-to-reach areas<\/li>\n<li>a combination of measurement methods<\/li>\n<\/ul>\n<p>The choice depends on the scale, required accuracy, and the purpose of the survey.<\/p>\n<h2>Want to know more?<\/h2>\n<p>Do you have questions about as-built surveys or their role within GRB registrations? <br>Please feel free to contact us for further information or advice.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1e3ecff e-flex e-con-boxed e-con e-parent\" data-id=\"1e3ecff\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7a19d23 elementor-mobile-align-center elementor-widget elementor-widget-button\" data-id=\"7a19d23\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-shrink\" href=\"https:\/\/topo4d.be\/en\/contact\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-caret-right\" viewBox=\"0 0 192 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M0 384.662V127.338c0-17.818 21.543-26.741 34.142-14.142l128.662 128.662c7.81 7.81 7.81 20.474 0 28.284L34.142 398.804C21.543 411.404 0 402.48 0 384.662z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Contact us! <\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>An as-built survey records how a project was actually executed. This data often forms the basis for updating the GRB. <\/p>\n","protected":false},"author":1,"featured_media":3491,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[59],"tags":[],"class_list":["post-3490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-base"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.9 (Yoast SEO v27.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>As-built surveys and GRB: what is the difference and connection?<\/title>\n<meta name=\"description\" content=\"As-built surveys record how a project was actually executed and often form the basis for inclusion in the GRB. 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