This layer shows the address points within Lake County, Indiana. It is maintained by the GIS department within the Lake County Surveyor's Office. The layer will be updated as changes are made to the source data.

This dataset was created using the spring 2023 ortho imagery of Lake County, Indiana and the Extract Features Using AI Models geoprocessing tool in ArcGIS Pro 3.5. The model used was the ESRI provided Building Footprint Extraction - USA. The polygon regularization method used was Right Angles with a tolerance of 1 meters. After the layer was created, a small amount of QA/QC was done manually by the Lake County Surveyor's Office. This work was mostly done along the major highways within Lake County. In an effort to eliminate 'noise' polygons the decision was made to delete all building footprints that were less than 151 square feet. Because of this many sheds and garages will not be included in this dataset.

Layer showing the locations of schools within Lake County, Indiana. The layer will be updated as potential changes are brought to the attention of the Lake County Surveyor's Office.

Point layer showing the locations of all fire stations within Lake County, Indiana. The layer was originally updated and verified in the summer/fall of 2016 by the GIS department. It has since been updated several times as any additions or subtractions involving the data are discovered. It will continue to be updated in the same manner.

This data represents the land contour elevations for Lake County, Indiana. The contours are at intervals of five feet. The contours were created using a 5 foot resolution DEM derived from 2005 orthophotography. The DEM was run through the focal statistics tool using a 10 x 10 cell grid to smooth the contour lines. Contours were then created using the contour tool in ArcGIS. The contours were clipped down to the county boundary. The steps in the video linked below were followed to create these countours https://www.youtube.com/watch?v=q3iblCHGoZk.

This layer shows the road centerlines for Lake County, Indiana. It will be updated as any changes are made to the source data.

This layer shows the geographic township boundaries within Lake County, Indiana.

Point layer showing the locations of all police stations within Lake County, Indiana. The layer was originally updated and verified in the summer/fall of 2016 by the GIS department. It has since been updated several times as any additions or subtractions involving the data are discovered. It will continue to be updated in the same manner.

High resolution buildings dataset for Lake County, IN. The primary sources used to derive this buildings layer were 2013 LiDAR data and 2013 Ortho imagery. Ancillary data sources included GIS data provided by Lake County or created by the UVM Spatial Analysis Laboratory. This buildingsdataset is considered current as of Summer, 2013. Object-based image analysis techniques (OBIA) were employed to extract building information using the best available remotely sensed and vector GIS datasets. OBIA systems work by grouping pixels into meaningful objects based on their spectral and spatial properties, while taking into account boundaries imposed by existing vector datasets. Within the OBIA environment a rule-based expert system was designed to effectively mimic the process of manual image analysis by incorporating the elements of image interpretation (color/tone, texture, pattern, location, size, and shape) into the classification process. A series of morphological procedures were employed to insure that the end product is both accurate and cartographically pleasing. Following the automated OBIA mapping a detailed manual review of the dataset was carried out at a scale of 1:2,500 and all observable errors were corrected.This dataset contains footprints for buildings and some large out buildings. Many garages and sheds are not included in this dataset. The Lake County Surveyor's Office ran the Regularize Building Footprints geoprocessing tool after the layer was created to make the building footprints more aesthetically appealing.

Point layer showing the locations of all hospitals within Lake County, Indiana. The layer was originally updated and verified in the summer/fall of 2016 by the GIS department. It has since been updated several times as any additions or subtractions involving the data are discovered. It will continue to be updated in the same manner.

This point layer shows the spot elevations in most of Lake County, Indiana. The layer was derived from the 1 foot 1998 contour polyline layer. It does not cover any area north of Interstate 80/94.

This dataset was created from the National Hydrography Dataset water bodies feature class. Processes were run in order to only include the water bodies related to Lake County, Indiana. A definition query was then used to only show the water bodies classified as lakes.Information on the National Hydrography Dataset can be found below:The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.

This data represents the land contour elevations for Lake County, Indiana. The contours are at intervals of one foot. The layer represents te land elevation as of 1998.

High resolution impervious dataset for Lake County, IN. The primary sources used to derive this impervious layer were 2013 LiDAR data, 2013 Ortho imagery and 2012 NAIP imagery. Ancillary data sources included GIS data provided by Lake County or created by the UVM Spatial Analysis Laboratory. This impervious dataset is considered current as of Summer, 2013. Object-based image analysis techniques (OBIA) were employed to extract impervious information using the best available remotely sensed and vector GIS datasets. OBIA systems work by grouping pixels into meaningful objects based on their spectral and spatial properties, while taking into account boundaries imposed by existing vector datasets. Within the OBIA environment a rule-based expert system was designed to effectively mimic the process of manual image analysis by incorporating the elements of image interpretation (color/tone, texture, pattern, location, size, and shape) into the classification process. A series of morphological procedures were employed to insure that the end product is both accurate and cartographically pleasing. Following the automated OBIA mapping a detailed manual review of the dataset was carried out at a scale of 1:2,500 and all observable errors were corrected.

This dataset was created from the National Hydrography Dataset flowlines feature class. Processes were run in order to only include the flowlines related to Lake County, Indiana. Information on the National Hydrography Dataset can be found below:The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.

This data is point elevations extracted from the 1ft contour feature class using Esri ArcGIS Desktop 10.3.1 Spatial Analyst Tools.