topic Re: Load Local Shapefile with Symbology and Attributes in ArcGIS API for Flex Questions

Load Local Shapefile with Symbology and Attributes

Anonymous User — Wed, 14 Jul 2010 20:10:46 GMT

Original User: tbrophy

All,
This is a question that I hope has been asked before:
Is there any way for my users to load a shapefile into my SFV while retaining the attributes and the symbology of the layer file?

I downloaded and am using �??Shape File Overlay for Sample Viewer�?� from the ArcGIS resource Center, submitted 3-4-2010 by �??HardWork�?�. It works great, but I need it go a step further.
//
Shape File Overlay for Sample Viewer
http://resources.esri.com/arcgisserver/apis/flex/index.cfm?fa=codeGalleryDetails&scriptID=16846
//

I really need the symbology and attributes to make it complete. Has anyone done this? Any suggestions would be incredibly appreciated!!!

I have 2 applications using Web Mercator & WGS84
Sample Flex Viewer: flexviewer-src-1.0.zip (Build 06.12.09)
agslib-1.2.swc
flex_sdk_3.2
Required Adobe Flash Player version 10

Attached are 2 sample shapefiles (and .lyr files) in both projections: (102100, 4326)

Re: Load Local Shapefile with Symbology and Attributes

Anonymous User — Thu, 15 Jul 2010 10:50:33 GMT

Original User: elmeras

Hello. I believe you and I want the same thing. I asked as similar question on the thread below: http://forums.arcgis.com/threads/7364-How-to-display-.dbf-attributes-for-the-Shape-File-Overlay-for-Sample-Viewer?highlight=shape+overlay.
I hope we get direction soon. I will continue to check both of our threads and I will let you know if I receive any feedback. Thanks - Allison

Re: Load Local Shapefile with Symbology and Attributes

ReneRubalcava — Thu, 15 Jul 2010 12:59:18 GMT

A quick look at the description of the Shapefile Overlay description says it uses some of this library
http://code.google.com/p/vanrijkom-flashlibs/wiki/SHP
and Mansour Raad's post here
http://thunderheadxpler.blogspot.com/2008/12/shapefile-viewer.html

The latest comments also state the file has been updated to include the DBF library needed to show attributes, so you may want to try downloading it again. Looks he compiled them into a nice .swc already. The source should be the same as here
http://vanrijkom-flashlibs.googlecode.com/svn/trunk/org/vanrijkom/dbf/

If you check out the example Mansour provides, he also uses that DBF library from the same author to show the attribute data. Unforunately, I don't know of a way to read a .lyr file and parse it in Flex. I don't know enough about the internals of the file for that.

Re: Load Local Shapefile with Symbology and Attributes

Anonymous User — Mon, 09 Aug 2010 17:29:02 GMT

Original User: nathanenge

Have you been sucessful in getting the shapefile overlay to label based on attribute?

Re: Load Local Shapefile with Symbology and Attributes

ThomasBrophy — Mon, 09 Aug 2010 18:58:02 GMT

Have you been sucessful in getting the shapefile overlay to label based on attribute?

Not yet. I was hoping this widget had already been created. This has to be a common workflow. . .

Re: Load Local Shapefile with Symbology and Attributes

Anonymous User — Tue, 17 Aug 2010 18:04:15 GMT

Original User: rjgonzalez73

Have you been sucessful in getting the shapefile overlay to label based on attribute?

Attached is a modified version of the shapefile overlay widget that allows you to modify the symbology, displays the first attribute and supports points, lines and polygons. You will need to have the original shapefile widget installed and update with the attached files.

Let me know if this works for you. If it does, I can post it to the code gallery.

DISCLAIMER: An intern in my group modified the widget, so I didn't write the code.

Re: Load Local Shapefile with Symbology and Attributes

ThomasBrophy — Wed, 18 Aug 2010 18:34:58 GMT

Attached is a modified version of the shapefile overlay widget that allows you to modify the symbology, displays the first attribute and supports points, lines and polygons. You will need to have the original shapefile widget installed and update with the attached files.

Let me know if this works for you. If it does, I can post it to the code gallery.

DISCLAIMER: An intern in my group modified the widget, so I didn't write the code.

Works great! Thank you so much. I got about 12 "3596: Duplicate variable definition" warnings in FB3, but I can live with that.

Have you done much re-projection work in Flex? Robert Scheitlin helped me out a bunch with this before he moved on to his work w/ SFV 2.0. I use Bing base maps in the Web Mercator Aux Sphere (102100) projection for my Flex project. Every time my users want to use this tool, they need to convert their shapefile from WGS 1984 Geographic (4326) à (102100) in ArcMap first. Do you know of a way to convert this �??on-the-fly�?�?

Note: The input shapefiles are always in (4326), so the conversion would always be the same.

Any help would be greatly appreciated. Thanks again for the earlier help. I�??m going to implement it this week.

Re: Load Local Shapefile with Symbology and Attributes

Anonymous User — Wed, 18 Aug 2010 18:47:52 GMT

Original User: nathanenge

It worked for me as well, though I had to search the net for a couple of i_bold icons. thanks for this.

Re: Load Local Shapefile with Symbology and Attributes

ThomasBrophy — Wed, 18 Aug 2010 19:04:19 GMT

[ATTACH]2208[/ATTACH]

Attached are the DrawWidget_wm adjusted files Robert Scheitlin helped me with some time ago. The code might help in the re-project on-the-fly. Thanks again.

Re: Load Local Shapefile with Symbology and Attributes

Anonymous User — Wed, 18 Aug 2010 19:08:10 GMT

Original User: rjgonzalez73

Works great! Thank you so much. I got about 12 "3596: Duplicate variable definition" warnings in FB3, but I can live with that.

I am using FB3 also and I get several 3596: Duplicate variable definition warnings, however the warnings point to my ConfigManager.as file. I am using a heavily customized version of the Sample Viewer, but I can download the original Sample Viewer and install the widget and see if I get the same warnings.

Have you done much re-projection work in Flex? Robert Scheitlin helped me out a bunch with this before he moved on to his work w/ SFV 2.0. I use Bing base maps in the Web Mercator Aux Sphere (102100) projection for my Flex project. Every time my users want to use this tool, they need to convert their shapefile from WGS 1984 Geographic (4326) à (102100) in ArcMap first. Do you know of a way to convert this �??on-the-fly�?�?

Note: The input shapefiles are always in (4326), so the conversion would always be the same.

I am new to Flex and GIS systems in general so I am trying to get up to speed and haven't done any re-projection work. Sorry I am not able to help with this part of it. Since I have received help from others on the forums, I wanted to share what I could.

Re: Load Local Shapefile with Symbology and Attributes

BjornSvensson — Thu, 19 Aug 2010 01:23:08 GMT

Do you know of a way to convert this �??on-the-fly�?�?

The Flex API doesn't directly convert features on-the-fly. However, there are two ways of converting from one projection to another.

1) If it's between geographic and web mercator, use the WebMercatorUtil class http://help.arcgis.com/en/webapi/flex/apiref/index.html?com/esri/ags/utils/WebMercatorUtil.html&com/esri/ags/utils/class-list.html to project the geometries. This is all done client-side.

2) Use the GeometryService project method to project geometries between any coordinate system. This will send the request to the server which will project it.

Note if using the 1.x API, the GeometryService took graphics, in 2.x it takes geometries instead.

Re: Load Local Shapefile with Symbology and Attributes

Anonymous User — Thu, 19 Aug 2010 11:31:50 GMT

Original User: tbrophy

1) If it's between geographic and web mercator, use the WebMercatorUtil class http://help.arcgis.com/en/webapi/flex/apiref/index.html?com/esri/ags/utils/WebMercatorUtil.html&com/esri/ags/utils/class-list.html to project the geometries. This is all done client-side.

Bjorn,
Thank you for the direction. I really appreciate it. I've been trying to get "WebMercatorUtil.geographicToWebMercator" into the ShapeFile_Overlay_PLP code from Ricky Gonzalez. Can you show me how this is done? I've been at it all morning. (I get in pretty early.)

I am using:
SFV: flexviewer-src-1.0.zip (Build 06.12.09)
agslib-1.2.swc
flex_sdk_3.2
Required Adobe Flash Player version 10

(We are switching server architecture and can't move to ArcGIS 10 or Flex 2.0 until early next year.)

Thanks for your help.

Re: Load Local Shapefile with Symbology and Attributes

leonardooletic — Sun, 22 Aug 2010 10:17:57 GMT

hi i downloaded the atached fzip and it returns me tha the zip file is invalid coul you send me the code to my personal email oletic@gmail.com, thanks a lot

Re: Load Local Shapefile with Symbology and Attributes

Anonymous User — Tue, 24 Aug 2010 09:16:56 GMT

Original User: coomsie

Hi,

thanks for the code,

I've quickly converted to the SFV 2.0 Beta 2, if anyone wants it.

I've included the compiled version and source code.

DISCLAIMER: A quick modify of the existing widget to bring it up to flex 2.0, code by others ....

p.s. it would be interesting to extend this to have the same graphics colors etc control as the advanced graphic widget in sfv 1.3 (we have one for SFV 2.0 - using flex 2.0 api) and have the ability to push the graphic (which is now geometry) into a feature layer as a new edit feature ... 🙂

Anyone thinking of doing that?

Cheers
Coomsie

Attached is a modified version of the shapefile overlay widget that allows you to modify the symbology, displays the first attribute and supports points, lines and polygons. You will need to have the original shapefile widget installed and update with the attached files.

Let me know if this works for you. If it does, I can post it to the code gallery.

DISCLAIMER: An intern in my group modified the widget, so I didn't write the code.

Re: Load Local Shapefile with Symbology and Attributes

ThomasBrophy — Thu, 26 Aug 2010 15:43:48 GMT

Attached is a modified version of the shapefile overlay widget that allows you to modify the symbology, displays the first attribute and supports points, lines and polygons. You will need to have the original shapefile widget installed and update with the attached files.

Let me know if this works for you. If it does, I can post it to the code gallery.

DISCLAIMER: An intern in my group modified the widget, so I didn't write the code.

Mr. Gonzalez,
I've tested your PLP version of the ShpOverlay and it works great for polygon shps in both WGS84 and Web Mercator flex applications. (SFV 1.0)

I did come across a point location error in a WGS84 the application. (It works fine for my Web Mercator app.) Have you tested the correctness of the point locations for a point shapefile input? (I did not test a line shapefile.) The points are all pulled towards the center of the map 0, 0 anywhere from 20 - 70 miles. Please let me know what you come up with.

Have you given any thought to:

- Allowing the user to choose the label field?
- Display using a color ramp for multi - feature polygon?
- A place in the code to convert projection? ie. Input shapefile WGS84 (4326) - Output projected graphic of shapefile in Web Mercator (102003) application.

Thank you again for hard work on the PLP version you posted.

Re: Load Local Shapefile with Symbology and Attributes

Anonymous User — Thu, 26 Aug 2010 16:05:20 GMT

Original User: tbrophy

Have you tested the correctness of the point locations for a point shapefile input? (I did not test a line shapefile.) The points are all pulled towards the center of the map 0, 0 anywhere from 20 - 70 miles.

I just figured out what is going on:
The offset of the graphic points generated by our tool was so random that I was curious about their LAT LONGs. I was right, each graphic point was right to the whole number. If the point was -85.9495, 33.6794, the graphic point would be located at -85.00, 33.00. And the reason it works perfectly for Web Mercator is that it uses whole numbers in meters.

I hope this helps in your adjustments.

Re: Load Local Shapefile with Symbology and Attributes

Anonymous User — Mon, 30 Aug 2010 14:12:52 GMT

Original User: rjgonzalez73

I did come across a point location error in a WGS84 the application. (It works fine for my Web Mercator app.) Have you tested the correctness of the point locations for a point shapefile input? (I did not test a line shapefile.) The points are all pulled towards the center of the map 0, 0 anywhere from 20 - 70 miles. Please let me know what you come up with.

As I indicated in my original post, I didn't write the code so I didn't do any testing. I haven't really looked at the code in depth to support it or add additional functionality. I just posted the code since people were asking for the functionality and I knew it would be useful. Once my environment has been upgraded to API version 2.0, I will revisit this widget and see if I can include some of the changes you requested.

Re: Load Local Shapefile with Symbology and Attributes

EjayLai — Wed, 01 Sep 2010 14:29:47 GMT

That's great! I have issue with opening the file. It says 'it's not a valid zip file'. Any one has the same issue at all or I missed something?

Thanks.

Hi,

thanks for the code,

I've quickly converted to the SFV 2.0 Beta 2, if anyone wants it.

I've included the compiled version and source code.

DISCLAIMER: A quick modify of the existing widget to bring it up to flex 2.0, code by others ....

p.s. it would be interesting to extend this to have the same graphics colors etc control as the advanced graphic widget in sfv 1.3 (we have one for SFV 2.0 - using flex 2.0 api) and have the ability to push the graphic (which is now geometry) into a feature layer as a new edit feature ... 🙂

Anyone thinking of doing that?

Cheers
Coomsie

Re: Load Local Shapefile with Symbology and Attributes

Anonymous User — Wed, 01 Sep 2010 18:10:57 GMT

Original User: millsa

Mr. Gonzalez,
I've tested your PLP version of the ShpOverlay and it works great for polygon shps in both WGS84 and Web Mercator flex applications. (SFV 1.0)

Hi Thomas,

How did you get the widget to re-project in your Web Mercator application?

Also, to fix the point issue in your WGS84 widget, change the following in "ShpPoint.as":
        private var xcoor:Number;

        private var ycoor:Number;

        public function ShpPoint(xco:Number, yco:Number)

thanks,
-Adam

Re: Load Local Shapefile with Symbology and Attributes

IainCampion — Wed, 01 Sep 2010 23:18:50 GMT

Hi,

it need the file to be a zip one currently,

i.e.

a normal zip file with all the normal gis file within it.

+ *.dbf
+ *.shp
+ *.shx

you could change the code to look for the files unzipped.

That's great! I have issue with opening the file. It says 'it's not a valid zip file'. Any one has the same issue at all or I missed something?

Thanks.