DGS Digital Geologic Information Resource (DGIR) User Guide

Transcription

1 DGS Digital Geologic Information Resource (DGIR) User Guide Developed by the Delaware Geological Survey. Revised January 2012.

2 TABLE OF CONTENTS I. INTRODUCTION II. DGIR LAYOUT III. TOOLBARS IV. USING DGIR V. DATASETS VI. CONNECTING TO MAP SERVICES VII. NOTES Delaware Geological Survey Introduction 2

3 Introduction What is DGIR? The DGS Digital Geologic Information Resource (DGIR) is an online data and map viewer for a variety of geologic and hydrologic data released by the Delaware Geological Survey and other state and federal agencies. It was designed to deliver, by web-technologies, the most commonly available and requested geologic and hydrologic information. This information is generally needed for use in studies required by regulation and ordinance and for use by state agencies to support water resource management decisions. DGIR functions as a tool to explore Delaware at and below the ground surface rather than a simple collection of maps displayed together. Although the DGS website distributes much of the data available through DGIR, and other datasets in DGIR can be found on the web as well, the existing text and list search tools on the DGS web site, and other web sites, frequently do not allow the casual or non-frequent user of the web site to find all information that is appropriate for the task at hand. Our goal is that provision of DGS resources through a focused web-based data delivery application will standardize the availability and means of access for these resources for governmental agencies, development community, consultants, and the public, creating more efficient access to information and improved capability for thorough analysis of all applicable data. In its simplest form, DGIR is a map-based front-end to various types of geoscience data. Many of these datasets can be visualized by adding them to the main map from the layer list. Other datasets must be queried and their data values returned in a display window. Information about each dataset can be found by viewing the metadata for each layer, found by right-clicking the layer name in the Active Data Layers and Available Data Layers windows. In addition to the typical GIS-based map tools (zoom in, zoom out, pan, zoom to scale, change coordinates, etc ), DGIR provides access to data via four types of queries: Identify, Identify Well Query, Surface Query, and Subsurface Query. The operation of DGIR is described later in this document in the Using DGIR section. DGIR development was supported by the DNREC Water Supply Section and the DGS. Delaware Geological Survey Introduction 3

4 DGIR Layout Available data layers panel Toolbars Active data layers panel Active data legends panel Delaware Geological Survey DGIR Layout 4

5 Tools Header Tools Zoom in: Zooms in to a specified area of the map Zoom out: Zooms out from a specified area of the map. Pan: Shifts the map view to a desired location without changing the viewing scale Zoom to Initial Extent: Zooms the map to the original extent of the map Zoom to full extent of active data: Zooms to an extent in which all active data is visible Go back to previous extent: Returns the map to the previous map view Go to next extent: Sets the map forward to the next map view. Sets the map to a specified scale A tool that when applied to the map in a specified location, opens a window showing any active data layer s attributes. Clear identified features: Clears any identified features Identifies wells within the area of a point location. A wells layer must be an active data layer for this to work. Opens up a window of surface data available for a point location Opens up a window of subsurface data available for a point location View help information about DGIR Delaware Geological Survey Tools 5

6 Footer Tools Allows measurement of a line by length or a polygon by area. Clears any measurements from the map. Makes a bookmark of the map with all current settings of the map including extent and all active layers so DGIR can be opened up at a later time with the same settings. Toggles on and off the scale bar and scale ratio from being visible on the map. Toggles the units the map is displayed in. The default is State Plane Meters. Toggles the basemap that appears within the map as well as the basemap opacity. DGIR offers three basemaps (Google Terrain, Google Satellite, and Open Street Map) as well as an option for no basemap. Delaware Geological Survey Tools 6

7 Using DGIR About Data Layers Available Data Layers: All data layers are listed under the Available Data Layers section. A number of data layers are available to add to the map display, such as geologic maps, roads, and water table data. Each data layer is organized within folders that correspond to the type of data. For example, all recharge data is under one folder, all base data such as boundaries and well grids are under another, etc. Adding Data: To add a layer to the map display, expand the appropriate folder to show its contents and click on the desired layer. Alternatively, right clicking on a layer and selecting Add layer also adds the layer to the map display. Once a layer has been added to the map, it will also appear in the Active data layers section and its symbology appears in the active data legend. Delaware Geological Survey Using DGIR 7

8 Searching: It is also possible to search for desired layers by typing in a keyword related to the title of the layer such as Roads or GeoMap in the search bar above the available data layers list. Toggling On/Off: This function toggles active data layers on or off in DGIR, within the Active data layers window. To turn a layer on or off that has already been added to the map display, simply check or uncheck the box next to the layer name. To turn on all the active data layers, click on the Check all button. To turn off all the active data layers, click on the Uncheck all button. Removing Layers: To remove a layer, right click the layer and select Remove layer. Delaware Geological Survey Using DGIR 8

9 Zoom: To zoom to a specific layer, right click the layer in the Active data layers panel and click Zoom to layer. Layer Order: All layers are drawn on the map in the order they are listed within the Active data layers panel. Layers listed above others will be drawn on top of layers listed at the bottom of the list. Adding a new layer to the map display will place that layer above all others by default. To reorder the layers, click on a layer and drag it up or down within the list to the desired order. Opacity: To change opacity, right click on a layer within the Active data layers panel and drag the bar to desired opacity. More Information: To find out more information about a layer, right click the layer under the Active data layers panel and select More information. Or right click the layer under the Available data layers and select View metadata. Delaware Geological Survey Using DGIR 9

10 Using Map Queries DGIR offers five methods of querying data within the map: Identify, Identify Wells, Surface Data Query, and Subsurface Data Query. To identify features present in active data layers within a specified location, use the Identify tool. Click on the Identify tool icon and draw a box around the desired location to bring up a window containing active data layers within that area. Click on an individual layer to view details for the features within that layer. To identify specific well information around a specified point location, use the Identify Wells tool. Click on the Identify Wells tool icon and click on a desired point area to open up a window containing any wells found in close proximity to this location. Select an identified well and click Show Data for Selected Well to show available information pertinent to that well. Note that a wells layer must be an active data layer for this tool to work. To query surface data including recharge potential and surface geology type, use the Surface Data Query tool. Click on the Surface Data Query tool icon and click on a desired point area to open up a window containing any surface data available for that location. To query subsurface data such as depth to water level in differing conditions and aquifer heights, use the Subsurface Data Query tool. Click on the Subsurface Data Query tool icon and click on a desired point area to open up a window containing any subsurface data available for that location. To clear identified features from the map, click the Clear Identified Features icon. Delaware Geological Survey Using DGIR 10

11 Connecting to Map Services In development Delaware Geological Survey Connecting to Map Services 11

12 Datasets DGIR contains a number of commonly used geologic and hydrologic data released by the Delaware Geological Survey and other state and federal agencies. Available data are listed in the tables below. More information on any dataset can be found within DGIR: right click on the desired layer within the Active data layers panel and select More information. All Geologic and Hydrologic Maps are produced by the Delaware Geological Survey Geologic Maps Dataset Date GM8 Geology of the Milford and Mipsillion River Quadrangles Jun 1993 GM9 Geology of the Seaford Area Jun 1995 GM10 Bedrock Geologic Map of the Piedmont of Delaware and Adjacent Pennsylvania Jan 2000 GM11 Geology of the Ellendale and Milton Quadrangles Jan 2001 GM12 Geology of the Lewes and Cape Henelopen Quadrangles Sept 2003 GM13 Geologic Map of New Castle County, Delaware Sept 2005 GM14 Geologic Map of Kent County, Delaware Oct 2007 GM15 Geologic Map of the Georgetown Quadrangle May 2010 GM16 Geologic Map of the Fairmount and Rehoboth Beach Quadrangles Mar 2011 GM17 Geologic Map of the Harbeson Quadrangle Mar 2011 Dataset Geologic Map of Delaware 1:24K Geologic Map of Delaware 1:100K Comprised of: GM9, GM11, GM12, GM15, GM16, GM17. Data for overlapping areas are taken from the most recent map. GM13, GM14, and currently unpublished Sussex County geologic map. Hydrologic Maps Dataset Date Digital Water-Table Data for Sussex County, Delaware (Digital Data Product No ) Sep 2005 Digital Water-Table Data for Kent County, Delaware (Digital Data Product No ) Sep 2005 Digital Water-Table Data for New Castle County, Delaware (Digital Data Product No ) Sep 2005 Kent and Sussex County Groundwater Recharge Potential (Digital Data Product No 02-01) Feb 2002 Delaware Geological Survey Datasets 12

13 Recharge Resource Protection Areas for New Castle County, Delaware Feb 2006 Thickness, elevation of the base, and transmissivity of the unconfined aquifer in Sussex Jul 2006 County (Digital Data Product No 06-01) Depths of tops and bottoms of aquifers in Kent County (being revised from RI72) Early 2012 Depths of tops and bottoms of confined aquifers in Sussex County Early 2012 Well/Boring Data Lithologic descriptions Geophysical logs Groundwater level observations Digital photographs of wells (installations or cores) Wells within DGS published cross-sections Current Current Current Current Date of publication Other Datasets Dataset Date Source Delaware Municipal Boundaries Current Delaware Office of State Planning Coordination Delaware Watersheds 2009 US Geological Survey State and County Boundaries Current Delaware Geological Survey National Hydrography Dataset 1998 US Geological Survey USGS 7.5-Minute Quadrangles 1992 US Geological Survey Site Identifier Grids (1 mile and 5 mile) Current Delaware Geological Survey Major Roads of Delaware Current Delaware Geological Survey Statewide Wellhead Protection Areas 2007 Delaware Department of Natural Resources and Environmental Control Delaware Wetlands 2007 Delaware Office of Management and Budget Digital Elevation Model - Sussex 2005 Lidar - USGS Digital Elevation Model Kent and New Castle 2007 Lidar Sanborn, Inc. Delaware Geological Survey Datasets 13

14 Notes DGIR works best with latest versions of the Mozilla Firefox and Internet Explorer web browsers. Although not thoroughly tested, it should work with other major browsers Chrome, Opera, and Safari. However, use of DGIR with other browsers is not recommended as some functionality may not behave as expected. The Identify tool may not work properly in Google Chrome web browser. DGIR is not designed to work on small mobile devices, such as smart phones. Disclaimer The main focus of the DGIR tool is to deliver the geologic and hydrogeologic information maintain by the Delaware Geologoic Survey. Most datasets were published with a report describing the data, methods used, and limitations of accuracy and of use. Some datasets, such as lithologic and geophysical logs, are delivered as raw data and have not gone through a vigorous or external review. Other datasets not geologic or hydrogeologic in nature are primarily used for reference only and may not be of regulatory use. These include Delaware wetlands, watersheds, water bodies and rivers/streams, elevation/dem, and the background layers Google Maps and OpenStreetMap. Details of each layer, with links to additional information, can be found by right-clicking the layer name and selecting "More Information." Delaware Geological Survey Notes 14