{"id":176691,"date":"2011-09-28T23:25:25","date_gmt":"2011-09-28T23:25:25","guid":{"rendered":"http:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&p=176691"},"modified":"2018-12-18T12:05:39","modified_gmt":"2018-12-18T20:05:39","slug":"what-is-the-local-government-information-model","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-solutions\/water\/what-is-the-local-government-information-model","title":{"rendered":"What is the Local Government Information Model?"},"author":4661,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[22841,23051],"tags":[53541,33181,28881,26631,23101],"industry":[],"product":[42661],"class_list":["post-176691","blog","type-blog","status-publish","format-standard","hentry","category-local-government","category-water","tag-arcgis-for-water","tag-local-government-information-model","tag-stormwater","tag-wastewater","tag-water-utilities","product-arcgis-solutions"],"acf":{"short_description":"The maps and apps that comprise ArcGIS for Water Utilities are built around the Local Government Information Model","flexible_content":[{"acf_fc_layout":"content","content":"

The maps and apps that comprise\u00a0ArcGIS for Water Utilities<\/a>\u00a0are built around the\u00a0Local Government Information Model<\/a>, so we thought it would beneficial to explain what the Local Government Information Model is in this blog and in a\u00a0 follow up blog explore its benefits for water, wastewater and stormwater utilities.<\/p>\n

We\u2019ll start by breaking down the term Local Government Information Model into two parts \u201cLocal Government\u201d and \u201cInformation Model\u201d.<\/p>\n

Local Government<\/b><\/p>\n

ArcGIS for Water Utilities is a module of\u00a0ArcGIS for Local Government<\/a>.\u00a0 ArcGIS for Local Government is organized around typical services or functions of a local government \u2013 water, sewer and stormwater utilities, public safety, land records, public works, etc.\u00a0 From a GIS perspective, no matter what type of entity a water utility is \u2013 a municipal department, an authority, part of a county, part of national government, private or a public private partnership, the scale of the data necessary to effectively map and manage your utility is similar to the scale of GIS data used by other local government entities.\u00a0 Simply put, water utilities need local scale GIS data.<\/p>\n

The feature classes and feature datasets in the Local Government Information Model are \u201charmonized\u201d meaning that they are designed to work across and support typical functions of local governments without duplication and redundancies.\u00a0 This enables municipal departments, functions within an organization or entire organizations to manage data that is specific to their domain and utilize data from other domains within local government as base data.<\/p>\n

If you look across a typical city enterprise GIS implementation that encompasses all of a city\u2019s departments, what you\u2019ll notice is that the \u201coperational data\u201d of one department is often \u201cbase data\u201d for another.\u00a0 For example the parcels maintained by a city\u2019s land records department are typically base data for the city\u2019s water utility. The water utility may use the attributes of the parcels for analysis or may join a table to the parcels with water utility specific information.\u00a0 Another example is the GIS features of a city\u2019s storm water system that are maintained by the water department but are used as base data for the city\u2019s 411 system that is managed by the city\u2019s public works department.\u00a0\u00a0\u00a0 It\u2019s important to point out that when we say \u201cbase data\u201d we don\u2019t just mean the data is used as a base mapping layer, it can be used for analysis or can be extended by the utility (in the example of joining a table of utility created data to a parcel data).\u00a0 Data not maintained by the utility is used as base data to provide perspective but can also blur the lines and become operational data when used for analysis or joined to information maintained by the utility<\/p>\n

The same logic applies to water utilities that are authorities or private companies.\u00a0 Some of the layers they use for base data typically come from other local units of government (cities, towns, counties) within their service territory.<\/p>\n

Information Model<\/b><\/p>\n

We are using the term Information Model because this is more than just a data schema.\u00a0 In the GIS realm the term \u201cdata model\u201d has commonly implied a schema or database structure only.\u00a0 The Local Government Information does include a schema, but we consider things like the Map Documents for our maps and apps and specifications for services to be part of the information model as well.<\/p>\n

We are including Map Documents in the Local Government Information Model for two main reasons.\u00a0 First the Map Documents for our maps and apps are built upon best practices for each particular type of map.\u00a0 For example\u00a0 in the Mobile Map Template the .MXD documents have been designed to show best practices for building an interactive water utilities map for field crew use.<\/p>\n

Secondly the maps and apps are built specifically for the geodatabase schema that is part of the Local Government Information Model.\u00a0 What this means is if you change the underlying schema to better reflect the true organizational needs of your utility than depending on the changes made you may have to modify any map documents that use that layer. Since you use the Map Documents to publish services to ArcGIS Server than the same logic applies for including services in the Information Model.\u00a0 The schema, the map documents and the services are intertwined.<\/p>\n"}],"authors":[{"ID":4661,"user_firstname":"Howard","user_lastname":"Crothers","nickname":"Howard Crothers","user_nicename":"hcrothers","display_name":"Howard Crothers","user_email":"hcrothers@esri.com","user_url":"http:\/\/solutions.arcgis.com","user_registered":"2018-03-02 00:16:15","user_description":"Howard leads the Esri team developing ArcGIS Solutions for electric, gas, water, sewer, stormwater, communications, renewables, and district heating and cooling.","user_avatar":""}],"related_articles":"","card_image":false,"wide_image":false},"yoast_head":"\nWhat is the Local Government Information Model?<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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