Background shapefile does not appear
I am sorry that I am only using ArcGIS and do not know R well. Professor recommended us to join the mailing list when I took a GIS class last year in which we learned a little about R. I find the differences in the "Extent" between my point shapefile and the NYC school district file: My point shapefile has: Top (40.902338??), Bottom (40.507909??), Left (-74.243994??), and Right (-73.708851??) NYC shapefile has: Top (272844.293801 ft), Bottom (120121.881268 ft), Left (913175.108826 ft), and Right (1067382.508423 ft). I guess my point file has longitude and latitude in the "Extent" and may need some conversion. Sorry that I do not use R. Anyway, thank you very much for your time and help. Best, Taeko
On Thu, Apr 9, 2015 at 8:00 PM, MacQueen, Don <macqueen1 at llnl.gov> wrote:
This is a nice description of your steps, but I can't tell how it
translates to R (this is R-sig-Geo). For example, what does
imported and displayed the data using "X Y Coordinate"
mean within R? Similarly,
exported "All Features"
sounds like some sort of a menu command, not an R command.
What are the R commands that you used for these steps? Or at least the
plot commands.
There is advice available for how to ask questions about using R that it
would be good to take a look at:
http://www.R-project.org/posting-guide.html It is also helpful if you can provide commented, minimal, self-contained, reproducible code. -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 From: <Suga>, Taeko <ts2789 at tc.columbia.edu> Date: Thursday, April 9, 2015 at 4:36 PM To: dh m <macqueen1 at llnl.gov> Cc: "R-sig-Geo at r-project.org" <R-sig-Geo at r-project.org> Subject: Re: [R-sig-Geo] Background shapefile does not appear Dear Mr. MacQueen, Thank you very much for your response. 1) I downloaded data (public school name, logitude, and latitude) from the NCES Common Core Data. 2) I imported & displayed the data using "X Y Coordinate." 3) Coordinate System of Input Coordinates by "Import"nysd,shp" created by the NYC Department of City Planning. Projection: Lambert_Conformal_Conic False_Easting: 984250.000000 False_Northing: 0.000000 Central_Meridian: -74.000000 Standard_Parallel_1: 40.666667 Standard_Parallel_2: 41.033333 Latitude_Of_Origin: 40.166667 Linear Unit: Foot_US (0.304801) Geographic Coordinate System: GCS_North_American_1983 Angular Unit: Degree (0.017453292519943295) Prime Meridian: Greenwich (0.000000000000000000) Datum: D_North_American_1983 Spheroid: GRS_1980 Semimajor Axis: 6378137.000000000000000000 Semiminor Axis: 6356752.314140356100000000 Inverse Flattening: 298.257222101000020000 4) I exported "All features" 5) I added the exported data as a layer. 6) I added the nysd (new york school district) But the shapefile (school district) does not appear. My point file is: Data Type: Shapefile Feature Class Shapefile: C:\Users\Taeko\Desktop\Export_Output_9.shp Geometry Type: Point Projected Coordinate System:NAD_1983_StatePlane_New_York_Long_Island_FIPS_3104_Feet Projection: Lambert_Conformal_Conic False_Easting: 984250.00000000 False_Northing: 0.00000000 Central_Meridian: -74.00000000 Standard_Parallel_1: 40.66666667 Standard_Parallel_2: 41.03333333 Latitude_Of_Origin: 40.16666667 Linear Unit: Foot_US Geographic Coordinate System:GCS_North_American_1983 Datum: D_North_American_1983 Prime Meridian: Greenwich Angular Unit: Degree Thank you very much for your support. Best, Taeko On Thu, Apr 9, 2015 at 9:44 AM, MacQueen, Don <macqueen1 at llnl.gov> wrote: My first guess is that your step "matched the geo-coding" did not succeed. But with no details it's hard to say. Is the NYC school district shapefile also in lat/long? If you apply the proj4string() function to both of your objects in R, do you get the same result? If you apply the bbox() function (bounding box) to both of them, do the bounding boxes at least overlap? Of course they are not shapefiles anymore after they have been loaded into R. Is the school point location data a SpatialPointsDataFrame, and the NYC school district a SpatialPolygonsDataFrame object? -Don -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 <tel:925-423-1062> On 4/8/15, 12:03 PM, "Suga, Taeko" <ts2789 at tc.columbia.edu> wrote: Dear All, I have created a school-point-location shapefile, using the school point location data (longitude & latitude) from the National Center for Education Statistics, Common Core Data system. I matched the geo-coding of the shapefile with the NYC school district shapefile created by the NYC Department of City Planning. Then, I try to over lay the point location to the NYC school district shapefile, but failed. The district shape file did not appear. Hope someone could help me. Thank you! Taeko Suga Ed.M. student Teachers College [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo at r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo