Identification_Information: Citation: Citation_Information: Originator: MDEP Publication_Date: 2001 Title: NOAA_Nautical_Chart_Catalog.lyr Geospatial_Data_Presentation_Form: tabular digital data Online_Linkage: Server=depsuna; Service=esri_sde81; User=gis; Version=SDE.DEFAULT Description: Abstract: This image catalog shows the NOAA nautical charts for any given area. Like other image catalogs, it is really just a pointer to the chart images stored in z:\images. These NOAA charts are converted from the MapTech BSB format. Purpose: To plot NOAA charts on maps. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2001 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.0 East_Bounding_Coordinate: -66.5 North_Bounding_Coordinate: 45.5 South_Bounding_Coordinate: 42.5 Keywords: Theme: Theme_Keyword_Thesaurus: REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords. Theme_Keyword: NOAA, nautical, charts, oil spill response Access_Constraints: None, but these files are licensed and may NOT be copied for use outside the DEP. Use_Constraints: Only to be used with DEP projects including oil spill response and MOSIS/EVI. Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.3.1.1850 Data_Quality_Information: Lineage: Process_Step: Process_Description: Methods for conversion of NOAA nautical charts to TIFF images Overview - the basic process was to convert the BSB charts from MapTech into ArcInfo grids using the ChartViewer extension from NOAA and Spatial Analyst extension from ESRI in ArcView 3.2a. The grids were then reprojected to UTM, borders were clipped, and colors were matched before converting to TIFFS. Three sets of TIFFs were made, the unclipped charts in UTM NAD83, the clipped charts in UTM NAD83, and the clipped charts in UTM NAD27 (for the Coast Guard). DETAILS Conversion - We got the newest BSB-format NOAA charts from MapTech, Edition 3.0, Region 2 (Block Island, RI to Canadian border). I copied these to a local drive on the Dell server. I then downloaded the BSB ChartViewer extension from NOAA's website: http://www.csc.noaa.gov/products/chartview/ and installed in on the Dell server, which was running ArcView 3.2a. I also installed ESRI's Spatial Analyst 1.1. on this server. Then, for each of the 58 charts in Maine waters, I added it to ArcView with the ChartViewer and saved it as a grid with Spatial Analyst. Projection - As I converted each chart, I checked to ensure they all had a consistent projection system. This was for the most part true, all were in a Mercator projection. However, the latitude of true scale varied between charts based on their location. I recorded each chart's latitude of true scale, and then coded an AML to run through and define each chart's projection in its corresponding grid. Then, I coded another AML to go through and reproject each grid to UTM with the following projection parameters: projection utm zone 19 units meters datum nad83 spheroid grs80 For the record, the Mercator projection used with these charts was based on the NAD83/WGS84 datum. A second set of grids was created with the same UTM parameters above, except datum nad27, spheroid clarke1866. Clipping - Once I had a complete set of charts as UTM grids, I coded an AML to run through each grid, clip it to the boundaries of the chart, and convert any NODATA cells to values of 2 (white). This operation was: grids_clip_83\g%quad% = con(isnull(selectpolygon(grids_utm\g%quad%, tempcov, / inside)), 2, selectpolygon(grids_utm\g%quad%, tempcov, inside)) The boundaries of each chart were taken from an ArcInfo coverage, which was on-screen digitized using the charts themselves. The coverage from the earlier charts was not used because it didn't line up. Also, the dates of the charts were added to this coverage. An export file (.e00) of this coverage is on the CD-ROM(s). Colormapping - I found that most charts had inconsistent color maps. The result was that I had to go through each chart and create an individual color map. I first recorded a consistent set of colors to be used in all charts, then checked each chart's grid in ArcMap to see what values related to the various features. The colors used are: Feature Color R G B Comment Text Black 0 0 0 Open water White 255 255 255 Coastal water Light Blue 215 225 235 Mid-water Lighter Blue 240 245 255 Not on all charts Land Khaki 240 220 190 Towns Darkest Khaki 175 160 130 Only on Canadian charts Intertidal Olive 200 200 175 Navigational Purple 175 105 235 Green buoys Forest Green 70 160 0 Bathymetry Aqua 0 205 255 On most charts, also Loran "W" Bathymetry 70% Gray 80 80 80 On few charts Shipping lanes Pink 240 195 255 On small-scale charts Boundary water 30% Gray 180 180 180 International water boundary Canada charts Medium Khaki 190 175 145 Only on Canadian charts Regulatory area Steel Blue 100 180 255 NWR's, parks, etc. Cleared areas Pale Green 200 255 215 Casco Bay charts Loran "Y" 50% Gray 110 110 110 On small-scale charts Colormap files were created for each grid with the appropriate RGB values, then converted to TIFFs. The .cmp files are on the CD-ROM(s). Conversion - All grids were then converted to TIFFs using the Arc GRIDIMAGE command, with the appropriate .cmp file, and compressed with packbits compression. LZW was not used so that the images could be utilized in ArcView (which doesn't support LZW compression). CD-ROM - The TIFF images, along with supporting files, were written to CD-ROM by the GIS Unit. Three sets were created - unclipped images in UTM NAD83, clipped images in UTM NAD83, and clipped images in UTM NAD27. December 20, 2000 Michael R Smith Maine DEP GIS Unit michael.smith@state.me.us Process_Date: Dec 20 2000 Process_Step: Process_Description: To create a catalog of the converted TIFF images, I wrote an AML to loop through all the images, capture their extent using [SHOW MAPEXTENT], and write that to a text file. The text file was converted to DBF in Excel, and imported into SDE as this catalog. Process_Date: 2000 Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: C:\DOCUME~1\sde\LOCALS~1\Temp\12\xml3.tmp Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: NOAA_Nautical_Chart_Catalog Entity_Type_Definition: Attribute table Entity_Type_Definition_Source: ESRI Attribute: Attribute_Label: IMAGE Attribute_Definition: Actual location of the image Attribute_Definition_Source: ESRI Attribute: Attribute_Label: XMIN Attribute_Definition: minimum x coordinate of the image Attribute_Definition_Source: ESRI Attribute: Attribute_Label: YMIN Attribute_Definition: minimum y coordinate of the image Attribute_Definition_Source: ESRI Attribute: Attribute_Label: XMAX Attribute_Definition: maximum x coordinate for the image Attribute_Definition_Source: ESRI Attribute: Attribute_Label: YMAX Attribute_Definition: maximum y coordinate for the image Attribute_Definition_Source: ESRI Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal SDE ID Attribute_Definition_Source: ESRI Distribution_Information: Resource_Description: Map Files Metadata_Reference_Information: Metadata_Date: 20090522 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Maine DEP GIS Unit Contact_Person: REQUIRED: The person responsible for the metadata information. Contact_Position: GIS Manager Contact_Address: Address_Type: mailing address Address: State House Station 17 City: Augusta State_or_Province: Maine Postal_Code: 04333 Contact_Voice_Telephone: REQUIRED: The telephone number by which individuals can speak to the organization or individual. Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile