FOR557

Command Line No choices (menus, clicking). YOU have to remember what to type! Strange stuff like –Arc: &workspace e:\yourname\ugis\data

Command Line Arc: &workspace e:\yourname\ugis\data Arc prompt (you are supposed to type something)

Command Line Arc: &workspace e:\yourname\ugis\data & tells ARC that the following command is an AML

Command Line Arc: &workspace e:\yourname\ugis\data The command: Name of a program to execute

Command Line Arc: &workspace e:\yourname\ugis\data The argument to this AML is the path to a workspace e: is the drive letter The rest is a hierarchy of folders

Path Local disk (E:) yourname ugis data e:\yourname\ugis\data

In chapter 4 these cmds are used &workspace &station Create Drawenvironment Draw Coordinate digitizer Mapextent Editfeature Usage Kill Quit Listcoverages Describe Select Arc Arcedit

A Incantation of Cmds ARC: &workspace e:\lpherrrin\land ARC: listcoverages ARC: station 9999 ARC: arcedit ARCEDIT: editco stuff ARCEDIT: drawenvironment tics arcs nodes ARCEDIT: draw

A Mantra of Cmds ARC: &workspace e:\lpherrrin\land ARC: listcoverages ARC: station 9999 ARC: arcedit ARCEDIT: edit stuff ARCEDIT: drawenvironment tics arcs nodes ARCEDIT: draw &WORKSAPCE Allows you to change the directory at which ARC is pointing (or using). And it can only point to 1(one) directory BUT you can run multiple Arc sessions.

A Mantra of Cmds ARC: &workspace e:\lpherrrin\land ARC: listcoverages ARC: station 9999 ARC: arcedit ARCEDIT: edit stuff ARCEDIT: drawenvironment tics arcs nodes ARCEDIT: draw LISTCOVERAGE Lists all the coverages in the current workspace. If there are no coverages then the current workspace is NOT a workspace! OR use &SYS DIR Too see all contents

A Mantra of Cmds ARC: &workspace e:\lpherrrin\land ARC: listcoverages ARC: station 9999 ARC: arcedit ARCEDIT: edit stuff ARCEDIT: drawenvironment tics arcs nodes ARCEDIT: draw ARCEDIT Launches the arc editor, one of the most used programs in ARC The following 3 are arcedit commands – they do not work in ARC! Or may do something you don’t expect!

Abbreviated Cmds ARC: &workspace e:\lpherrrin\land &works ARC: listcoverages lc ARC: station 9999 ARC: arcedit ARCEDIT: edit stuff ARCEDIT: drawenvironment tics arcs nodes ARCEDIT: draw drawe works for above

Cmd help structure BUILD {POLY | LINE | POINT} enclose required argument lower case arguments replaced by a name { } enclose options in upper case | means OR # is a place holder BUILD mymap POLY

Navigation A/I has this neat little trick: These will allow scrolling through last n commands The horizontal arrow keys will allow you to scroll through the current command and edit it by backspacing over characters and typing new ones. Try it – it is a great time saver when you screw up a command!

Creating digital data or How to be a dig-grunt

OUTLINE Digitizing Why we are doing it? What are we going to do? How are we going to do it?

Data structures There are only three data types –point user id in a poly cov point data ( i. e... wells) –line –poly Warning: You can’t mix poly and point data! Because A/I can’t tell the difference between labels and points

Coverages The data structure you will be making is called a coverage A coverage contains geographic and attribute data Part of the coverage is a folder called INFO. A workspace contains both coverages and an INFO folder

INFO files The INFO folder is the key to a workspace. If a folder contains an INFO folder it is a Workspace Workspaces can be moved using DOS or Windows explorer operations Coverages CANNOT be moved except by the use of COPY in ARC

File Structure F: F:/HarryF:/JaneF:/Jones F:/Jones/H20 F:/Jones/Info F:/Jones/shore F:/Jones/dock F:/Jane/build F:/Jane/street F:/Harry/Srp F:/Harry/tfd F:/Harry/ejst F:/Harry/stuff root F:/Jane/street/A2 F:/Jane/street/info

File Structure F: F:/HarryF:/JaneF:/Jones F:/Jones/H20 F:/Jones/Info F:/Jones/shore F:/Jones/dock F:/Jane/build F:/Jane/street F:/Harry/Srp F:/Harry/tfd F:/Harry/ejst F:/Harry/stuff root F:/Jane/street/A2 F:/Jane/street/info

The book “problem” Find site for laboratory Criteria –suitable soil –suitable landuse –>20m from streams –<= 300m of sewer –area >=2,000m 2

Data layers for the “book problem” Find site for laboratory Criteria –suitable soil soil cover poly –suitable landuse landuse cover poly –>20m from streams hydro cover arc –<= 300m of sewer sewer cover arc –area >=2,000m 2 final product poly

Sources of this data –soil cover poly NRCS? –landuse cover poly Planning? NRCS? –hydro cover arc USGS –sewer cover arc City engineering

Simplified Book Process landuse soil IntersectIntersect soil & use OK hydro

Simplified Book Process Select >= 2000 Erase- cov Buffer stream IntersectIntersect soil & use OK landuse soil hydro

Getting ready Format ZIP disk if necessary Follow the directions to move the “book” data from CD to your zip drive –move the data directory from the CD to the root of your zip Start Lesson 4 –Prepare paper map –Tape map down on digitizer near the center

Prepare the manuscript Tics numbered Start/stop points on all island polys Nodes marked on long arcs Boundary extended by 1/16” Why: Because what you digitize will be clipped to fit within a surrounding coverage! Existing data Your Map Your boundary will be clipped off

Map on the digitizer Some digitizers in the lab have a plastic sheet over the active surface. Tape your map on top of the plastic sheet or you will not be able to mark the “done” arcs are you go. Not marking as you go is a MAJOR BOO BOO!!! NOTE: You DO NOT have to put the map back in the same place every time - A/I will adjust for map placement. That is what registering TIC’s is all about.

Putting the map on the digitizer Orientation does not matter Make it flat and tight BUT you must be within active zone of tablet Experiment to see where active zone is by watching the light on the digitizer as you move the cursor around.

Starting Arc/Info Always start any of the arc programs (arcedit, arcplot, etc.) from ARC ARC is started from the icon on the left side of the screen or from Start Menu Can only be seen after you login –userid: FOR557 –password: lagis

First Incantation Launch Arc Go to folder: &WORKSPACE path Create a new workspace in that folder CREATEWORKSPACE name Move into the new workspace &WORKSPACE name

Fire up ARCEDIT When you start ArcInfo you will have a prompt like –Arc: Type arcedit Specify which digitizer is hooked to your computer –Digitizer 3400 Com1 -- for Calcomp digitizers –Digitizer ALTEK32 -- for LUCY –Digitizer 9100 Com1 -- for RERUN Follow book in creating a TICCOV Use CREATE to make a new cover from the TICCOV into which you are going to digitize data NEVER, EVER digitize data into your TICCOV!!!

Input from digitizer Start arcedit to edit the new coverage –Arcedit: edit [cover] –Arcedit: drawe all –Arcedit: draw You have to tell A/I where data is coming from –Type COORDINATE DIGITIZER (or COO DIG ) to tell arcedit data is coming from digitizer –Use COO MOUSE | CURSOR for mouse input –Use COO KEYBOARD for keyboard input

What is a TICCOV? A TICCOV is a special coverage which contains only TICs TICs are the spatial locators for the coverage TICs have x,y coordinates –table inches –real world coordinates Note: the name TICCOV is not Holy but is sort of standard. You can use any name you want for a TICCOV - note the two uses of the word: a coverage name and a type of coverage!

Creating a new coverage Now you have to create a new coverage of TICs only After creating a workspace and doing –arc: &Station 9999 –arc: arcedit –arcedit: coo dig –arcedit: CREATE TICCOV 1 –digitize a minimum of 4 tics –Signal the end of tic input with TIC-ID = 0 1 : CREATE will create a TICCOV out of whole cloth OR it will create a new coverage from an existing coverage (TICCOV)

Inputting tics Always hold puck same way and approach the tics from same direction You are going to –enter the TIC-ID from the PUCK!!! –WAIT FOR THE ID TO APPEAR ON THE SCREEN!!!! –if ID is wrong enter a B or a # to redo –IF OK enter an A or an * –NOW Pput the PUCK X-HAIRS over the tic –Then press ANY KEY on the PUCK

Done with tics? Enter tic id 0 (zero) then press A or * Now you will be asked to enter corners of the data boundary or EXTENT –Click on upper right and lower left corners of box (imaginary) enclosing data –This is called the BND or EXTENT of the cover SAVE the coverage

Paper BND? EXTENT? Extent of total book data TIC Extent of your book data Your data goes in here

Setting the drawing environment DRAWENVIRONMENT TIC IDS (DRAWE TIC IDS) DRAW Yup! two commands –DRAWE sets the draw environment (tics, arcs, label points, etc. {or all}) –DRAW draws that environment

Create a real coverage Type CREATE LANDDG01 TICCOV –CREATE make new coverage from another –DON’T digitize data into your TICCOV! Re-enter tics (why?) Accuracy! What if initial tics had error??? ARCEDIT will give RMS error - a comparison of the two tic sets If =< you are OK –if not OK do it again –if still not OK then error is in original, redo ORIG!!

Editing environment NODESNAP --- sets distance over which nodes will be snapped and how they will be snapped –NODESNAP CLOSEST.05 set features to be edited –EDITFEATURE ARC (EF ARC) set drawing environment –DRAWE ARC NODE LABELS IDS

Now add the arcs What to do to with the arcs????? –ADD –On each NODE press 2 –On each vertex press 1 –Pattern is , , 22,212 –NOT –Press 9 on the puck when you are done. 1) vertex 2) node 3) 4) del vertex 5)del arc 6) 7) 8) 9) QUIT

TRICKS BE CAREFUL!!!!!!!!!!!!!!!!!!!!!!!!!!!! MARK ARCS AS YOU DO THEM –duplicate arcs are a real PAIN to remove Use only enough vertices to define curves DO NOT use stream digitizing!!!

More tricks How to digitize - 2 methods –Overshoot method overshoot each arc intersection a wee bit use CLEAN to clean up the coveage –make intersections, delete dangles –but this moves stuff around on you - ‘puter decides –Node method put a node at every arc intersection count on the snap distance to snap the nodes together

Using Clean If you have data that looks like this then the best technique is to digitize the straight lines and let CLEAN put in the nodes Why? Because you cannot digitize a straight line if putting in nodes! If you do it carefully then clean will remove the overshoots also!

Another technique Digitize the long straight lines and then split the arcs at the intersection points to put in nodes Now digitize the other lines and let the snap distance work to snap the nodes

More tricks Don’t wait to delete arc if you see it is wrong! Use the 5 option on the puck if just added If is an old arc then quit ADD (9) You are still in edit feature arc (STATUS) – : SELECT –put x-hair on offending arc to select it (yellow) – : DELETE Do a few arcs and check, DELETE ALL if you are not happy and restart

More tricks yet Use the STATUS cmd to find out where you are (try it, you’ll like it!) To see if you have dangles –drawe node dangle ; DRAW To move a node –EF NODE –MOVE –May have to set EDITDIST AND SNAPDIST

Warning If you are careful you can do this in 3 hours If you are –sloppy and don’t pay attention to directions –didn’t read lesson before coming to lab It will take more than 3 hours In any case: get it done before next lab!!!