GIS

Modified November 16, 2011

Stony Brook University Map, Legend, and Other Data

Map (jpg)
Legend (jpg)
Map, Legend, Original pdf, and Georeferencing Files (zip)
Stony Brook University Campus Shapefiles (zip)
Long Island Coast Shapefile and Bergen Point tiff (zip)

Map and legend derived from printable map (pdf) downloaded from Stony Brook University Campus Maps on November 9, 2011.

Stony Brook University LatLong and UTM Finder

Wildwood State Park Maps for Practice Georeferencing

Google Earth Community: Wildwood State Park - The kmz attached at the bottom of the post contains an overlay of a trail map photographed on a post along the trail system. The map (jpg format) can be extracted from the kmz file for georeferencing.

Scanned, slightly wrinkled Wildwood State Park trail map (jpg).

Wildwood State Park Boulder Collection - Google Map with center crosshair and coordinates.

Shapefile, GPX, and Excel Files for GPS and Rock Mass Mapping

GEO 305 - November 15, 2011

Download RockMassSurvey.zip to a folder of your own and extract all files to the same folder.

Enter the field data into the spreadsheet and save it in that folder.

---------------------------

After Glenn arrives ...

Start ArcMap with a new map.
Set the data frame (named Layers) coordinate system to Predefined >Projected Coordinate Systems > UTM > Wgs 1984 > WGS 1984 UTM Zone 18N.
Add the SBU_Buildings and FieldArea shapefiles to the map.

Preparing GPX Data and Adding it to the Map

Open qwerty.gpx in Garmin MapSource.
Save As in the same folder in dxf format with the name qwerty.dxf.
Select Use UTM Coordinates in the dialog box, then OK.
Choose the Add Data button then double-click instead of single-click on qwerty.dxf (the version with the blue icon).
Select Point, then click the Add button. This will add the points to the map, but not the tracks and annotation.
Look at the attrubute table for qwerty.dxf Point and notice lots of fields (attributes), including Type.
Note that some of the records have Type set to the value User Waypoint. These rows represent the GPS waypoints, as you might guess.
Close the attribute table.

Selecting by Attributes

From the Selection menu, choose Select by Attributes.
Layer: qwerty.dxf Point
Method: Create a new selection
Double-click "Type" in the list of attributes.
Single-click the = sign.
Click the Get Unique Values button to see a list of the values that are available in the Type field.
Double-click 'User Waypoint'.
The code box should now contain the expression "Type" = 'User Waypoint'.
Click the OK button.
Now the waypoints turn blue on the map because they are selected.

Selecting by Location

Now, from that set, we need to select only those waypoints that are inside the FieldArea polygon.
From the Selection menu, choose Select by Location.
I want to select from the currently selected features in the following layer(s): querty.dxf Point
that: are completely within
the features in this layer: FieldArea
Click the Apply button.
Click the Close button.
Right-click qwerty.dxf Point in the table of contents
Choose Data > Export Data ...
Use the same coordinate system as the data frame.
navigate to the folder where your data is stored, and rename the Export_Output.shp file with a more meaningful name (Suggestion: CircuitPoints.shp).
Do you want to add the exported data to the map as a layer?: Yes
Remove qwerty.dxf Point from the table of contents.

Labeling the Points

Double-click CircuitPoints.
Choose the Labels tab in the Layer Properties dialog box.
Check Label features in this layer.
Label Field: Name.
Click the OK button.
Now, the points are labeled on the map.

Adding RockMassSurvey.xls to the Map

Keep ArcMap running, but minimize it.
In the spreadsheet, select the data you entered along with the ptnums and the column headings from ptnum to descript.
Paste the data into Notepad.
Remove the last carriage return (the empty line after the end of the data).
Save As RockMassSurvey.txt.
Close Notepad after you are sure you did this correctly.
Maximize ArcMap
Add RockMassSurvey.txt to the map. It will not yet appear on the map, but will be listed in the table of contents.
Right-click RockMassSurvey.txt in the table of contents, and choose Display XY Data.
Select easting as the X field and northing as the Y field.
Select the coordinate system as you did for the data frame.
Click the OK button to add the data points to the map.
Right-click, export the data, and add it it to the map.
Remove the original table from the table of contents.
Practice labeling and selecting by attributes, such as descript.

Adding and Filling a New Mass Field in the RockMassSurvey Shapefile

Open the attribute table of the new RockMassSurvey shapefile layer.
From the Options menu at the bottom of the table, choose Add Field ...
For Name, choose Mass.
For Type, choose Double.
For Precision, choose 10.
For Scale, choose 1.
Click the OK button.
Right-click the name of the new field, Mass, at the top of the attribute table.
From the menu that appears, choose Calculate Values ....
In the Field Calculator box that opens, right-click the field name, Mass, in the attribute table, and choose Calculate Values ....
In the message box that appears, click the Yes button.
In the Mass = box, type in the formula 2.8 * 3.14159/6 * [length] * [width] * [height] / 1000 for the mass in kilograms.
Click the OK button to perform the calculations.

GIS Sites

gis.com

GIS Lounge

Quantum GIS

Open Geospatial Consortium

----------------------------------------------------------------

geomatic mashups home

Created November 9, 2011