Trash-talk - Revision history

Johnsbe1 at 16:23, 14 October 2009

2009-10-14T16:23:21Z

← Older revision		Revision as of 16:23, 14 October 2009
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	=~~Managing~~ Data ~~Files~~=		=Data Management=
	This section covers how to download the data from the GPS unit, convert it to the necessary file type, and ultimately integrate it into GRASS.		This section covers how to download the data from the GPS unit, convert it to the necessary file type, and ultimately integrate it into GRASS.

Gaespin07: /* Converting Data Files */

2009-07-27T13:56:05Z

Converting Data Files

← Older revision		Revision as of 13:56, 27 July 2009
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	*Select the '''Convert to Plain Text''' option		*Select the '''Convert to Plain Text''' option
	*Select '''Choose File''' and browse the directory to find your desired file		*Select '''Choose File''' and browse the directory to find your desired file
	*Under '''Plain Text Delimiter''', select '''~~pipe (\|)~~'''		*Under '''Plain Text Delimiter''', select '''comma'''
	*Under '''Plain Text Output Units''', select '''U.S.'''		*Under '''Plain Text Output Units''', select '''U.S.'''
	*In the '''Time offset:''' field, type '''-4'''		*In the '''Time offset:''' field, type '''-4'''

Gaespin07: /* Importing Data Files */

2009-07-23T16:33:36Z

Importing Data Files

← Older revision		Revision as of 16:33, 23 July 2009
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	*The command will take almost two minutes to process but will be set up with the preferred coordinate system for later use		*The command will take almost two minutes to process but will be set up with the preferred coordinate system for later use
	*We are now ready to begin importing the .csv files that contain the data for the point maps		*We are now ready to begin importing the .csv files that contain the data for the point maps


	===Reprojecting vector maps===		===Reprojecting vector maps===

Gaespin07: /* Reprojecting vector maps */

2009-07-23T16:32:31Z

Reprojecting vector maps

← Older revision		Revision as of 16:32, 23 July 2009
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	*Hit '''Run'''		*Hit '''Run'''
	*The point map should now be in the same location as the county map and with the same coordinate system, meaning the two can be displayed together		*The point map should now be in the same location as the county map and with the same coordinate system, meaning the two can be displayed together
			*This process can be repeated for all point maps

Gaespin07: /* Importing Data Files */

2009-07-23T16:31:49Z

Importing Data Files

← Older revision		Revision as of 16:31, 23 July 2009
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	The location that we will use to import the .csv files is now set up with the appropriate coordinate system. This will allow us to validate the points' relative locations to each other.		The location that we will use to import the .csv files is now set up with the appropriate coordinate system. This will allow us to validate the points' relative locations to each other.

			===Importing .csv files===
			*Select the location created using the lat/lon projection under '''Project Location''' and hit '''Start GRASS'''
			*The python GUI should start
			*Under the '''File''' menu choose '''Import vector map''' which produces another menu, select '''ASCII points/GRASS ASCII vector import'''
			*Select '''Browse''' and choose any of the .csv files that were just recently made
			*Below that name give the output vector map a suitable name
			*Under the '''Columns''' tab designate which column gives the longitude and which one gives the latitude
			*Under the '''Optional''' tab, choose to skip the header row by giving the number of header rows that will be skipped, in this case its '''1'''
			*Hit the '''Run''' button
			*A vector map with the point data from the .csv file should have been created that you can now display by selecting the '''Add vector map layer''' button in the '''GRASS GIS layer manager''' window
			*You will have to right-click on the layer and select '''Zoom to selected map''' because we did not set the default extent for the region, so it will not show by default (does not apply if you did set the default extent)

	===Creating location using preferred coordinate system===		===Creating location using preferred coordinate system===
	The Richmond Sanitary District has provided a map of the county using the Transverse Mercator projection. Unfortunately, we cannot just overlay the point map of our data with the map of the county without doing some coordinate system conversion. Luckily, this feature is built into GRASS and we will take advantage of this but first we have to import that map into GRASS to use as our basemap.		The Richmond Sanitary District has provided a map of the county using the Transverse Mercator projection. Unfortunately, we cannot just overlay the point map of our data with the map of the county without doing some coordinate system conversion. Luckily, this feature is built into GRASS and we will take advantage of this but first we have to import that map into GRASS to use as our basemap.

	*~~Select~~ any starting location to start GRASS		*Relaunch GRASS and select any starting location to start GRASS
	*Under the '''File''' menu, choose '''Import vector map''', then '''Import vector data using OGR'''		*Under the '''File''' menu, choose '''Import vector map''', then '''Import vector data using OGR'''
	*For the '''OGR datasource name:''' field, select '''Browse''' and choose the '''Parcel_BND.shp''' file		*For the '''OGR datasource name:''' field, select '''Browse''' and choose the '''Parcel_BND.shp''' file
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	*We are now ready to begin importing the .csv files that contain the data for the point maps		*We are now ready to begin importing the .csv files that contain the data for the point maps

	~~===Importing .csv files===~~
	*Relaunch GRASS, this time select the location created using the lat/lon projection under '''Project Location''' and hit '''Start GRASS'''
	*The python GUI should start
	*Under the '''File''' menu choose '''Import vector map''' which produces another menu, select '''ASCII points/GRASS ASCII vector import'''
	*Select '''Browse''' and choose any of the .csv files that were just recently made
	*Below that name give the output vector map a suitable name
	*Under the '''Columns''' tab designate which column gives the longitude and which one gives the latitude
	*Under the '''Optional''' tab, choose to skip the header row by giving the number of header rows that will be skipped, in this case its '''1'''
	*Hit the '''Run''' button
	*A vector map with the point data from the .csv file should have been created that you can now display by selecting the '''Add vector map layer''' button in the '''GRASS GIS layer manager''' window
	*You will have to right-click on the layer and select '''Zoom to selected map''' because we did not set the default extent for the region, so it will not show by default (does not apply if you did set the default extent)

	===Reprojecting vector maps===		===Reprojecting vector maps===
			*Using this location, we can import the point maps and overlay them onto the county map
			*Under the '''Vector''' menu, select '''Develop vector map''', then '''Reproject vector map'''
	v.in.~~ascii~~ input~~=blah~~ output~~=blah skip=1 x=4 y=3~~		*Give the location of the desired point map in the '''Location...''' field
			*Give the name of the input vector map under the '''Optional''' tab as well as a different name for the output vector map (if desired, otherwise the name will stay the same if this field is left blank)
			*Hit '''Run'''
			*The point map should now be in the same location as the county map and with the same coordinate system, meaning the two can be displayed together

Gaespin07: /* Importing Data Files */

2009-07-23T16:19:59Z

Importing Data Files

← Older revision		Revision as of 16:19, 23 July 2009
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	*You will have to right-click on the layer and select '''Zoom to selected map''' because we did not set the default extent for the region, so it will not show by default (does not apply if you did set the default extent)		*You will have to right-click on the layer and select '''Zoom to selected map''' because we did not set the default extent for the region, so it will not show by default (does not apply if you did set the default extent)

			===Reprojecting vector maps===


	v.in.ascii input=blah output=blah skip=1 x=4 y=3		v.in.ascii input=blah output=blah skip=1 x=4 y=3

Gaespin07: /* Importing .csv files */

2009-07-23T16:15:10Z

Importing .csv files

← Older revision		Revision as of 16:15, 23 July 2009
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	===Importing .csv files===		===Importing .csv files===
	*~~Select~~ the ~~newly~~ created ~~location~~ under '''Project Location''' and hit '''Start GRASS'''		*Relaunch GRASS, this time select the location created using the lat/lon projection under '''Project Location''' and hit '''Start GRASS'''
	*The python GUI should start		*The python GUI should start
	*Under the '''File''' menu choose '''Import vector map''' which produces another menu, select '''ASCII points/GRASS ASCII vector import'''		*Under the '''File''' menu choose '''Import vector map''' which produces another menu, select '''ASCII points/GRASS ASCII vector import'''

Gaespin07: /* Creating location using preferred coordinate system */

2009-07-23T16:12:33Z

Creating location using preferred coordinate system

← Older revision		Revision as of 16:12, 23 July 2009
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	*Select any starting location to start GRASS		*Select any starting location to start GRASS
	*Under the '''File''' menu, choose '''Import vector map''', then '''Import vector data using OGR'''		*Under the '''File''' menu, choose '''Import vector map''', then '''Import vector data using OGR'''
	*		*For the '''OGR datasource name:''' field, select '''Browse''' and choose the '''Parcel_BND.shp''' file
			*Below this, choose a descriptive name for the output map
			*Under the '''Optional''' tab name the location that will house the imported county map, which will be created once the '''Run''' button is selected
			::''Note: This will be used as the location for all subsequent point map reprojections''
			*The command will take almost two minutes to process but will be set up with the preferred coordinate system for later use
			*We are now ready to begin importing the .csv files that contain the data for the point maps

	===Importing .csv files===		===Importing .csv files===

Gaespin07: /* Importing Data Files */

2009-07-23T15:59:44Z

Importing Data Files

← Older revision		Revision as of 15:59, 23 July 2009
Line 43:		Line 43:

	The location that we will use to import the .csv files is now set up with the appropriate coordinate system. This will allow us to validate the points' relative locations to each other.		The location that we will use to import the .csv files is now set up with the appropriate coordinate system. This will allow us to validate the points' relative locations to each other.

			===Creating location using preferred coordinate system===
			The Richmond Sanitary District has provided a map of the county using the Transverse Mercator projection. Unfortunately, we cannot just overlay the point map of our data with the map of the county without doing some coordinate system conversion. Luckily, this feature is built into GRASS and we will take advantage of this but first we have to import that map into GRASS to use as our basemap.

			*Select any starting location to start GRASS
			*Under the '''File''' menu, choose '''Import vector map''', then '''Import vector data using OGR'''
			*

	===Importing .csv files===		===Importing .csv files===

Gaespin07: /* Importing Data Files */

2009-07-23T15:32:08Z

Importing Data Files

← Older revision		Revision as of 15:32, 23 July 2009
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	*Type in '''wgs84''' or scroll down to find it at the end of the page, its the very last entry		*Type in '''wgs84''' or scroll down to find it at the end of the page, its the very last entry
	*Continue to the last page and select '''Finish'''		*Continue to the last page and select '''Finish'''
			*You can set the default extent for the region but it can also be left alone for now

	The location that we will use to import the .csv files is now set up with the appropriate coordinate system. This will allow us to validate the points' relative locations to each other.		The location that we will use to import the .csv files is now set up with the appropriate coordinate system. This will allow us to validate the points' relative locations to each other.

	===Importing .csv files===		===Importing .csv files===
	*		*Select the newly created location under '''Project Location''' and hit '''Start GRASS'''
			*The python GUI should start
			*Under the '''File''' menu choose '''Import vector map''' which produces another menu, select '''ASCII points/GRASS ASCII vector import'''
			*Select '''Browse''' and choose any of the .csv files that were just recently made
			*Below that name give the output vector map a suitable name
			*Under the '''Columns''' tab designate which column gives the longitude and which one gives the latitude
			*Under the '''Optional''' tab, choose to skip the header row by giving the number of header rows that will be skipped, in this case its '''1'''
			*Hit the '''Run''' button
			*A vector map with the point data from the .csv file should have been created that you can now display by selecting the '''Add vector map layer''' button in the '''GRASS GIS layer manager''' window
			*You will have to right-click on the layer and select '''Zoom to selected map''' because we did not set the default extent for the region, so it will not show by default (does not apply if you did set the default extent)




			v.in.ascii input=blah output=blah skip=1 x=4 y=3