Q2: Which Classification do you think best represents the data and why?
Standard Deviation. I went through the process of making a dot map to see which classification represented a more accurate visual representation. The standard deviation represented the data better visually showing the extremes more realistically. When I compared the mean to Quantile & Natural Breaks, I was disappointed to see the visual color scheme appeared to represent more population that was actually depicted on the dot map. The colors were deceiving. As a regular person the legend of the standard deviation is not clear. Therefore, I added notes to my single map choice for reader assistance.
Process Summary
Map 1 – Week3_Data_Class_Study2.kfm4
1) Downloaded Data Classification.zip from R:\drive to S:\drive, in my week 3_Data Classification folder.
2) Opened ArcMap new map- inserted new Data Frame layer. In Add Data dialog box- moved to my S:\drive \cartography file\week3 found file & added escambiscensus.shp file. Map appeared.
3) Opened properties, then symbology, then quantities, selected p_black in value field, chose classify, chose one of four Natural Breaks, Standard Deviation, Quartile & Equal Interval. Check number of classes to either 4-5 made sure “show class ranges as features values” not checked. Selected color ramp (went through several with a couple of the layer frames for best fit), used graduated colors.
4) Still in same properties, under General tab, gave layer new name “Natural Breaks” (which ever classification I was using), check the “source tab” for metadata, back to symbology, apply, ok map turned out. Moved to next classification layer and did same using 3 & 4 steps.
5) Followed this pattern for all four classifications. In layout view, separated out the layers, began to add legends – revised these several times for clarified reading. Set gap at 5 with background color and border on legends.
6) Began to insert scale, north arrow, text boxes for labels to each map, text boxes for date, name and data source. Was saving map throughout, closed out, came back , reopened ArcMap 10, sometime with the tinkering of fine tuning, I either clicked too much or in the wrong spot without much attention and the map portion for each layer crashed. I had the outlines, legends, a title box or two, On my TOC, I had little boxes with little red exclamation marks like warning lights. I left, ate supper, said good nite to daughter and came back to computer late to start over again with fresh map and restarted computer.
7) Began a second time for first map assignment. Already had data downloaded went to ArcMap new map inserted New Data Frame- add data, added escambiascensus.shp to map. In layout view 75% Opened properties, same as 3 & 4 above but added legend & text box while in same map layer. In properties, changed name of layer to type of classification I was doing. Applied all my additions, result one map with legend & label.
8) Stayed in layout view moved each map to the side leaving empty middle of screen for new Data layer for next classification map layer. Did this for all four. Saved map after each map layer added. After all four map layers on page. Saved again before I began moving & placing maps on one map page. Activated each map as I moved it. Moved legend & label. Sized boxes, full extent to stretch map, saw all needed conforming. Found scale that was best, activated each layer, scaled each to size of 1:931,406, created it as default on scale dropdown. 2nd attempt took half as much time. Used Draw & rectangle to create title box, put neatline, adjusted background, fine tuned appearance.
Saved file throughout. Exported to s:\ and desktop.
Map 2- Week3_Select_Class_Map_kfm4
This map went much smoother than any that I have completed. I was go glad. Here’s how it developed.
1) I wanted to compare the classifications we made above to actual population raw data. To do this I opened ArcMap, new map, added data from our data classification.zip, the escambiscensus.shp file. It was already the active file in the add data dialog box.
2) To create a dot map of raw data for comparison: Opened properties, symbology, quantities, dot map, set color, left defaults since I was not as familiar.
Changed layer name in properties to DOT MAP, checked on source information, same, coordinate system same, its all the same file, just different visuals of it.
3) Went to layout view, moved dot map to side of work area.
4) In layout view, added new data frame for second map, add data - same shape file above. In properties again symbology, classify, standard deviation, graduated colors, same color scheme as before used 5 as class number. Labels, changed layer label to standard deviation. Apply, ok, closed file.
5) Activated each map frame clicked on scale, used same 1:931,406 as before, set it as default.
6) Added legend to standard deviation, modified names of legend elements for viewing. In legend wizard, used gap of 5 for x, y; added border 0.5. & background color.
7) Moved and sized each individual map frame, added text label boxes identifying each.
8) Inserted North Arrow, scale (changed shading to lessen visual impact) inserted text boxes for name, date, data source. Activated text box properties to enter text, size text, change style.
9) Inserted 2 information text boxes for information on each map frame. Created rectangle & oval using draw & shape tool, set background for these.
10) Made rectangle title box, kept it active then inserted title, moved title forward. Inserted neatline & background.
11) Fine tuned appearance. Saved map throughout. Exported to S drive & desktop to archive on personal computer.
No comments:
Post a Comment