Misc. ArcMap Stuff Andrew Phay

Transcription

1 Misc. ArcMap Stuff Andrew Phay

2 Prjectins Used t shw a spherical surface n a flat surface Distrtin Shape Distance True Directin Area Different Classes Thse that minimize distrtin in shape are called cnfrmal. Thse that minimize distrtin in distance are knwn as equidistant. Thse that minimize distrtin in area are knwn as equalarea. Thse minimizing distrtin in directin are called truedirectin prjectins.

3 State Plane used fr reginal areas (States r part f a state) Uses three cnfrmal prjectins depending n which state Better accuracy fr cunty level (in general) State Plane Nrth and Suth UTM used fr larger areas Split int 60 znes UTM Zne 10 and 11 WGS 1984 Lat/Lng

4 Datums Prjectins In the image, the earth is shwn as the irregular surface (thick black line). A generalized earth-centered crdinate system (WGS84, in blue) prvides a gd verall mean slutin fr all places n the earth. Hwever, fr specific lcal measurements, WGS84 cannt accunt fr lcal variatins. Instead, lcal datums have been develped. In this example, the lcal Nrth American Datum f 1927 (NAD27, in dashed red line) mre clsely fits the earth's surface in the upper-left quadrant f the earth's crss-sectin. NAD27 nly fits this quadrant, s t use it in anther part f the earth will result in serius errrs in measurement. Fr mapping Nrth America, in rder t btain the mst accurate lcatins and measurements, NAD27 r NAD83/91 are used.

5 Prjectins Hw I make it easier n myself COPY all the prjectins I use frequently int ne flder

6 Prjectins Finding that lst prjectin Start with a prject that has at least ne file yu already knw the prjectin f that will line up with the lst prjectin shapefile Aerial pht wrks well here as lng as it has a prjectin Bring in the new shapefile that desn t have a prjectin Change the Crdinate System f the Data Frame until they match up Define Prjectin

7 Prjectins Link t mre inf n Prjectins

8 Spatial Analyst Prvides raster functinality within ArcGIS Wrks with cells instead f pints, lines and plygns Raster vs Vectr Raster is faster Generally prcessed faster Can generate large files Vectr is crrectr Lks mre like what we are used t seeing Can prvide mre detail Rasters are mre suited t wrking with cntinuus data Elevatin, Precipitatin, Ppulatin Remte sensing applicatins

9 Map Algebra Spatial Analyst Hydrlgic Mdeling (finding watersheds) Terrain mdeling Slpes, aspect, cntur, hillshade Ppulatin mdeling

10 Cnturs Spatial Analyst Query ut length Use Smthline Tl t smth ut the jagged edges

11 Slpe Spatial Analyst

12 Hillshade Spatial Analyst

13 Mdel Builder Mdel Builder is an applicatin in which yu create, edit, and manage mdels I use it t help autmate repetitive tasks

14 Mdel Builder

15 Queries

16 Queries Watch yur AND & OR "NAME" = 'Andersn Creek' AND "Cunty" = 'Whatcm Only streams named Andersn Creek and in Whatcm Cunty "NAME" = 'Andersn Creek' OR "Cunty" = 'Whatcm Shws Andersn Creek and anything in Whatcm Cunty Use the Help

17 Queries as expressin in Labeling Queries

18 GPS in ArcMap Cnnect t GPS unit directly int ArcMap DNR Garmin Lad frm GPS units Lad GPX and ther files and cnvert int Shapefiles

19 Data abut data Metadata When yu are publishing data make sure yu have metadata! XML frmat in ArcMap FGDC is the mre prevalent frmat Federal Gegraphic Data Cmmittee T shw all the metadata in ArcMap 10 Frm the ArcCatalg file menu, chse Custmize -> ArcCatalg Optins, and select the Metadata tab Under Metadata Style, chse ISO Metadata Implementatin Specificatin and click OK.

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21 Questins? Andrew Phay x129