Friday, March 9, 2012

Week8-Vector 1-Analysis

No map this week.  We worked on two particular data selections: Selection by location then selection by attribute.  Our Metadata for the map layers and then our process summary follows.


1)      File name: Flood_Zones ---- Source: 2006 FEMA maps (objects 349)
o   S:\ introgis/week8Dataana-vect1/Vector1/Lab7Data.gdb/flood_zones
o   Data Type: vector
o   Feature Type: simple
o   Geometry Type: polygon
o   Reference System:  GRS 1980
§  Projection Name: GCS North America 1983 HARN/Albers
§  Projection:  Albers
§  Datum:  D North American 1983
§  Units:  degrees

2)      File name: Major_highways--- Source: 2010, Florida Department Transportation Roads
o   S:\ introgis/week8Dataana-vect1/Vector1/Lab7Data.gdb/
o   Data Type: vector   (count 59)
o   Feature Type: simple
o   Geometry Type: composite- polyline
o   Reference System: GRS 1980
§  Projection Name: GCS North America 1983
§  Projection: NAD 1983 Florida GDL Albers
§  Datum:  D North America 1983
§  Units:  degree

3)      File name: Superact_wells_esc  Source—Florida Law, Super Act (Chptr 376.3071), 5/2006
Underground Petroleum Environmental Response Act
o   S:\ introgis/week8Dataana-vect1/Vector1/Lab7Data.gdb/Superact_wells_esc
o   Data Type: vector
o   Feature Type: simple
o   Geometry Type: point  (object count 153)
o   Reference System: GRS 1980
§  Projection Name:  GCS North American 1983 HARN
§  Projection:  Albers Conical Equal Area (FGDL)
§  Datum:  D-North American 1983 HARN
§  Units:  degrees

4)      File name: join_drain_super_risk
o   S:\ introgis/week8Dataana-vect1/Vector1/Lab7Data.gdb/join_drain_super_risk
o   Data Type: file geodatabase feature class
o   Feature Type: simple
o   Geometry Type: polygon
o   Reference System: na
§  Projection Name: Albers Conical Equal Area (FGDL)
§  Projection: Albers
§  Datum: D-North American 1983 HARN
§  Units:  meter

5)      File name: join_super_well2risk
o   S:\ introgis/week8Dataana-vect1/Vector1/Lab7Data.gdb/join_super_well2risk
o   Data Type: file Geodatabase feature class
o   Feature Type: simple
o   Geometry Type: point
o   Reference System:na
§  Projection Name: Albers
§  Projection: Albers Conical Equal Area (fgdl)
§  Datum: D-North American 1983 HARN
§  Units:  meter

6)      File name: Pensacola parcels selection 3 (madeforflood information
o   S:\ introgis/week8Dataana-vect1/Vector1/Lab7Data.gdb/Pensacola_parcels_feb10_clip
o   Data Type: file geodatabase feature class
o   Feature Type: simple
o   Geometry Type: polygon
o   Reference System: (GDS 1980) not shown but is base for all metadata
§  Projection Name: Albers
§  Projection:  custom (GSC north American 1983 Harn)
§  Datum: D-north American 1983
                     Units:  meter

Process Summary starts here:

 
1)      In edesktop>s:drive>created week8dataana-vect1, moved vector1.zip fm r to s:>unzipped vector1. Opened Arcatalog under s:\introgis\week8… opened Lab7data.gdb\ began to record metadata for files Flood_zones, Major_Highways & Superact_wells_esc before beginning lab.
2)      On new map, opened vector1.mxd, first thing made copy of original map as Week8vector1.mxd, closed vector1, no changes opened up new map Week8vector1.
3)      First objective- Locate City of Pensacola parcels within 2000 feet of schools>Menu>selection by location- dialog box opens:
Select features from (Target layer) Pensacola Parcels
Source Layer – Pensacola Schools
Spatial selection method:  target layers features are within a distance of the Source layer feature
Yes to apply a search distance—2000 feet (ok searches on layer)
4)      Second Objective- Find parcels within 1 mile of a hospital (Wider area of source needed to include hospitals with a mile of city parcels at edge of city limits).
Menu>selection by location>dialog box:
Selection method: select from the currently selected features in (Pensacola Parcels left checked)
 layer: Escambia Hospitals
Target layers features are within a distance of the Source layer feature
Yes to apply a search distance   1  mile  (apply to keep layer choice open)
THESE TWO SEARCHES  CREATED “AND”   CHOICES
5)      CREATING A “BUT NOT” LIMITATION FOR THE SELECTED PARCELS ABOVE:
6)   Leaving the Select by Location Dialog open:
Selection method:  remove from the currently selected features in (leaving Pensacola Parcels as is)
Source layer: Rails -  the feature I do not want my parcels near.
Spatial selection method:   Target layers features are within a distance of the Source layer feature
Yes to apply a search distance   1 Kilometer  (apply instead of ok to stay in same function)
7)   ADDING LIMITING “AND” TO SAME LAYER
Still in Selection by Location dialog open:
Selection Method: select from the currently selected features in (Pensacola Parcels)
Source layer:  Escambia_cellular
Spatial selection method:  Target layers features are within a distance of the Source layer feature
Yes to apply a search distance   3000  feet  Hit ok to end this newly created layer.
8)      Opened attribute table to answer Q1.
9)      In TOC, Pensacola Parcels>selection>create layer from your selection>  layer at top of TOC “Pensacola Parcels selection”  renamed Parcels Nearby, map saved. Layer unchecked but default blue selection is still on map. Made a screen shot to record issue.  Have had this “it won’t remove” issue before.
10)   Step 2:  Adding “AND” for Parcels Nearby Layer to find Pensacola City parcels with 4 criteria above that are within the Enterprise Zones
Menu>Select by Location:  select from the currently selected features in:  Pensacola Parcels Selection
Source layer:   Enterprise_zones
Spatial selection method:  target layers features are within the source layer feature
No  to apply search distance-  apply  fewer parcels are showing. Ok
11)     TOC, >Pensacola parcels selection>selection>create layer from selection> new layer Pensacola parcels selection selection appears,>properties>symbology>Legend to label layer_EnterZoneLimit –Lost trying to find these parcels.  Backed up to end of Step1.  Studied and saw that the Enterprise zones are located as a selection under our original Pensacola Parcels.
12)     Deleted layer in 11.  TOC>Pensacola parcels>attribute table>see X listed>on PP layer>selection>create new layer from selection so I could see I’ve been successful. Ok.
13)     Using selected features as criteria to discover additional information.  With
14)     Menu>select by location>  Selection method: select features from
Target layer here: Superact_risk_features layer
Source layer: Pensacola Parcels ( use selected features) xx were selected as the sources
OK-  Back to TOC>on superact_risk_features layer>open attribute table, on selected feature. There is our target. Wow! This part worked.
Step 3:
15)  After some struggle first in TOC in top menu selections list comes up cleared old selections.
16)  Used this list later for reference. Main menu Selection>selection by location>select features from  Target: Pensacola parcels>source layer: Flood zones> Spatial selection>target layer features intersect the source layer feature> apply>ok -  selected 817 parcels.  Eventually figured to make this a separate layer   file path: s| S:\ introgis/week8Dataana-vect1/Vector1/Lab7Data.gdb/Pensacola parcels selection 3 (subname PenResd Parcels).
17)  Tried Select by attributes several ways, struggled.  Eventually got to correct combination.
18)  Select by Attributes>Layer: Pensacola parcels selection 3> Method: select from current selection “ Use_gen” = ‘Residential’.   Results were 666
19)  Finally.   It was the order of selection. Results on selection list in TOC, selected. 1st layer Pensacola parcels 817 2nd layer is Pensacola parcels selection 666. 
20)   Opened attribute table of Pensacola_parcels_feb10.clip (my subfile Pensacola parcels selection 3. On Market value>statistics>Sum, wrote in PS.
Step 4:
21)   Back to TOC displayed all water layers> on Superact_risk_features>joins & relates>joins  in Dialog box:  what do I want to join:  1-Layer  Drainage Basins 2-joining polygon to points
It falls inside:    3- file output S:\ introgis/week8Dataana-vect1/Vector1/Lab7Data.gdb/join_drain_super_risk.   (when selected layer, found vector1 file in directory, chose file or personal geodatabase and file for Lab7… came up. Clicked on it to open then file list appeared). OK, dots on map. Layer in TOC.
22)   Opened attribute table of new layer, found basin, summarize> new file:
S:\ introgis/week8Dataana-vect1/Vector1/Lab7Data.gdb/basin_sum,  See file listed last in layer list for map.  Opened summary attribute table & see it.
23)  TOC>superact_wells_esc>join>dialog:  join data from another layer based on spatial locaton
Choose layer:  superact_risk_features   2: joining points to points  Each point given attributes of point in layer….  3:  file path S:\ introgis/week8Dataana-vect1/Vector1/Lab7Data.gdbjoin_super_wells2risk.  After file showed in layer, went ahead and recorded metadata. Blue diamonds on map.  Good so far.
24)   Open attribute table and found answers to question 6.

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