| Description | |||
| Abstract: Represents the Baseline Survey Map Grid Index. Baseline Survey Maps are based on a grid system and show public right of way throughout the City of Richmond. The original baseline data shown on these maps (for areas of the City existing prior to 1970) is based on information measured by City survey crews. These maps are being constantly updated to reference changes to City r/w, plats prepared for acquisition or disposition of City property as well as other plats or plans prepared by or for DPW. These baseline sheets were the basis of utility mapping as well, prior to the adoption of GIS as the geospatial information management solution for utilities data. The Baseline Grid identifies each index cell by the corresponding Baseline Map ID. Many drawings will be refered by and indexed to the Baseline Map/Grid. | |||
| Purpose: The BaselineGrid feature class is part of the Department of Public Works' (DPW) Records Management & Maintenance System (RMMS), which is a GIS-based image document system used for a) managing scanned image .tif files, b) managing metadata about image files in a geodatabase, c) querying, viewing, and printing DPW drawings. The BaselineGrid provids hyperlinked references to the scanned image version of these old maps. | |||
| Supplemental Information: Drawings mainly represent: miscellaneous site & drawing plans, subdivision records, and baseline survey maps. Drawings originated from/converted from: hardcopy documents, microfilm, and DWG. Previous processes required Survey Division staff to manually research and hunt down any of these drawing types, resulting in deficient customer service response times and loss in valuable staff time. All drawing files, i.e. DWGs and scanned drawing images (.tifs), are stored on a separate file server, while the geographically based features and reference "imgr_" tables that relate to the drawing files are stored in the geodatabase. After drawings are copied or scanned to their destination on the RMMS file server, ArcMap becomes the interface used by GIS technical users for digitizing project boundaries (if appropriate) and/or are presented with forms for collecting drawing information/metadata, which is then stored in the geodatabase. The geodatabase "imgr_" feature classes and tables are used for: -Capturing spatial references of drawings (polygon feature classes) -Capturing basic project drawing metadata. (Name, DrawingNumber, DrawingTitle, Ordinance, AdoptionDate, CADFilePath, etc...) -Capturing/providing reference links to the scanned drawing images from the geodatabase. (ImageFilePath) -Expedient record searches for these drawings through either interactive identification queries in the GIS map interface (ArcMap), or queries via form(s). Notes on "imgr_" tables: imgr_ProjectType and imgr_Subdivision are tables stored outside of the ImageReference dataset. The "imgr_ProjectType" table is a table that contains the official list of types of drawings/projects, i.e. Acquisition, Alley Closing, Building Construction, Easement, Street Encroachment, etc..., which is used in the classification/metadata assignment for drawing types during the GIS-based data entry. The imgr_ProjectType table has a one to many relationship to the imgr_Project feature class. The "imgr_Subdivision" table is a table that contains the scanned/archived subdivision plan drawings provided to DPW and it contains the Name and recorded ImageFilePath for query/retrieval capabilities. The subdivision table is not related to GIS feature classes, but resides in the geodatabase as the RMMS is a GIS-residing application. Internal documentation on DPW's RMMS: Q:\Infrastructure\Geodatabase\Datasets\ImageReference\ Q:\Infrastructure\Geodatabase\Datasets\ImageReference\ProjectDevelopment\Documentation\ | |||
| Contact | |||
| Custodian: | Chul Chong | ||
| Department: | Public Works | ||
| Position: | GIS\Engineer II | ||
| Address: | 900 E Broad St, 6th Floor | ||
| City: | Richmond | ||
| State: | Virginia | ||
| Zip Code: | 23219 | ||
| Email: | Chul.Chong@richmondgov.com | ||
| Time Period of Content | |||
| Date: | 2004 | ||
| Status | |||
| Progress: | Complete | ||
| Update Frequency: | None planned | ||
| Spatial Domain | |||
| West Coordinate: | -77.603685 | ||
| East Coordinate: | -77.371852 | ||
| North Coordinate: | 37.617739 | ||
| South Coordinate: | 37.445442 | ||
| Spatial Data Information | |||
| Data Type: | vector digital data | ||
| Data Format: | SDE Feature Class | ||
| Data Projection: | Lambert Conformal Conic | ||
| Access and Usage Information | |||
| Access Constraints: | none | ||
| Use Constraints: | All GIS layers and datasets are owned by the City of Richmond and can not be modified, re-distributed, and/or re-sold without a sub-licensing agreement. All guarantees of validity expire once a dataset leaves the City of Richmond firewall or physical premises. Acknowledgement of the City of Richmond GIS would be appreciated in products derived from these data. | ||
| Entity and Attribute Information | |||
| Entity Name: | vector.ric.imgr_BaselineGrid | ||
| Entity Type: | Feature Class | ||
| Entity Count: | 758 | ||