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Heat Map on ArcGIS Viewer for Flex

MESHALALMASHAN

Hi,

I'm trying to implement a heat map on my ArcGIS viewer using the code posted on the following link:

http://thunderhead.esri.com/readonlyurl/HeatMapNew/srcview/

But still I'm not getting anything running yet as I'm not sure if it's compatible with the Viewer for Flex or not.

Any idea?

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LloydHeberlie

Hi LLoyd
I'm using the compiled widget and it works perfectly. Is there any possibility to include the population variable? I mean, one single point (A) is heater than another point (B) if the value in another field in A is greater than the value in B.

Giorgio,

Currently the code does not supported the concept of a "weighted attribute" to generate the heat map. I will add this to the list of features to implement for the next release. I hope to have this finished before the User's Conference in July (2012).

JorgeCrespo

Hi LLoyd
I'm using the compiled widget and it works perfectly. Is there any possibility to include the population variable? I mean, one single point (A) is heater than another point (B) if the value in another field in A is greater than the value in B.

LloydHeberlie

Does this work with proxies?

<layer>
<useproxy>true</useproxy>

Hi Roger,

After taking another look at the source code, it appears that I did not implement this.
I'll try and make sure this gets into the 3.0 update.
I just don't have time to fix it right now.

Sorry,

RogerKoelpin

Does this work with proxies?

<layer>
<useproxy>true</useproxy>

LloydHeberlie

Another user had posted (on another thread) a question about using queries so I thought I would repost on this thread.

If you are having issues with features being returned in your heat map, you might check the CaSe of the values in your field being used. The queries are case SenSitive.

Returns 132 records.
http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Earthquakes/Since_1970/MapServer/0/query?text=&geometry=&geometryType=esriGeometryPoint&inSR=&spatialRel=esriSpatialRelIntersects&relationParam=&objectIds=&where=Name+LIKE+%27%25CHINA%25%27&time=&returnIdsOnly=false&returnGeometry=true&maxAllowableOffset=&outSR=&outFields=*&f=html

Returns 0 records.
http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Earthquakes/Since_1970/MapServer/0/query?text=&geometry=&geometryType=esriGeometryPoint&inSR=&spatialRel=esriSpatialRelIntersects&relationParam=&objectIds=&where=Name+LIKE+%27%25China%25%27&time=&returnIdsOnly=false&returnGeometry=true&maxAllowableOffset=&outSR=&outFields=*&f=html

See the sample below for an earthquakes query using a LIKE operator on the field Name
The values in the <types></types> markup must match the values in your data (File Geodatabase Featureclass, etc).

Hope this helps,

Lloyd
Esri Flex Team

http://stlouis.esri.com/apps/flexviewer24/index.html?config=heatmap-config-like.xml

<?xml version="1.0" ?>
<configuration>
 <layers>
        <layer>
            <name>Earthquakes HeatMap</name>
            <url>http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Earthquakes/Since_1970/MapServer/0</url&gt;
            <outFields>YYYYMMDD,Magnitude,Num_Injured,Num_Deaths,Name</outFields>
   <useamf>true</useamf>
   <defaultquery>1=1</defaultquery>
   <querytemplate>Name LIKE '%REPLACE_STR%'</querytemplate>
   <types>CHILE,TURKEY,CHINA,PHILIPPINES,JAPAN,IRAN,INDIA</types>
   <type_descs>Chile,Turkey,China,Philippines,Japan,Iran,India</type_descs>
        </layer>
 </layers>
 <ui>
  <widget_dimensions>
   <width>378</width>
   <height>206</height>
  </widget_dimensions>
  <icons>
   <main_icon>i_rainbow.png</main_icon><!-- Icon must exist under assets/images in viewer -->
   <main_label>Main Panel</main_label><!-- Title/label for icon across the top widget panel -->
   <settings_icon>i_options.png</settings_icon>
   <settings_label>Settings Panel</settings_label>
  </icons>
  <refresh_label>refreshing layer...</refresh_label>
  <query>
   <comp_label>Earthquakes by geography:</comp_label>
   <heatmapquery_prompt>default selection</heatmapquery_prompt>
   <featurecount_label> features contained</featurecount_label>
  </query>
  <transparency>
   <comp_label>Transparency:</comp_label>
   <defaulttransparency>0.7</defaulttransparency>
  </transparency>
  <symbol>
   <comp_label>Theme:</comp_label>
   <defaulttheme>RAINBOW</defaulttheme><!-- Must be one of RED_WHITE_BLUE, RAINBOW, or THERMAL -->
  </symbol>
 </ui>
</configuration>

LloydHeberlie

I would like to show concentration of points on a map. I am thinking of a density map.

I was wondering whether the heatmap widget can give me something similar.
What api is used to create the heatmap? Do I require any external library?

Thanks

Did you take a look at the sample?
The heat map source code is not yet part of the ArcGIS API for Flex, but is included in the sample.
The sample on ArcGIS.com contains the compiled widgets for the ArcGIS Viewer for Flex and the source code needed to make any changes.
The source code and compiled widgets will show color coded areas of concentrated points.
It does require the ArcGIS API for Flex, which you can get on the Resource Center.

Hope this helps,

Lloyd
Esri Flex Team

RavinHasseea

I would like to show concentration of points on a map. I am thinking of a density map.

I was wondering whether the heatmap widget can give me something similar.
What api is used to create the heatmap? Do I require any external library?

Thanks

AndyCowx2

Lloyd,

I used the compiled 2.4 version of the widget and am successfully querying my mapservice and getting back the correct number of rows. Unfortunately I don't see any heat rendering, the map is empty.

Any ideas where I might have gone wrong ?

Thanks,

Andy

AdamRepsher

Lloyd!

Thank you so much for taking all of that time to document all of this. I will get back to this on Tuesday and let you know what I find.

--Adam

LloydHeberlie

Hi Lloyd,

I am having one heck of a time implementing this widget! I am attempting to utilize the files in HeatMapWidgetCode\v2\HeatMapWidget\src\HeatMap in my project. I am copying the "HeatMap" folder into my Widgets folder.

I am using the default Flex Viewer 2.4 (only adding widgets-no other customization), Flash Builder 4, 4.1SDK ("use SDK default" setting in Library path-Framework linkage). The ArcGISHeatMapWidget will not build the swf in my bin-debug widget folder. The <esri_stl:ProgressMessage and HeatMapThemeView lines both show errors "Could not resolve esri_stl:HeatMapThemeView to a component implementation."

I can, however, drop the compiled SWF from your HeatMapWidgetCode\v2\HeatMapWidget\bin\bin-2.4 folder into my bin-debug widgets folder, and it works....

Any pointers would be appreciated.

Thanks,
--Adam

Adam,

Sorry it took me so long to reply.
I use an external Flex Library for most of my stuff, so that's where the namespace originated.

Let's assume you have the source code in the following structure within the FlexViewer.

You'll probably want to make some additional folders under your src/widgets/HeatMap folder, if you don't intend on using your own external Flex Library Project.

Create the following folders.

src/widgets/HeatMap
src/widgets/HeatMap/layers
src/widgets/HeatMap/layers/supportClasses
src/widgets/HeatMap/events
src/widgets/HeatMap/utils
src/widgets/HeatMap/view
src/widgets/HeatMap/skins

Move the source files to the following locations.

src/widgets/HeatMap/ArcGISHeatMapWidget.mxml
src/widgets/HeatMap/ArcGISHeatMapWidget.xml
src/widgets/HeatMap/layers/ArcGISHeatMapLayer.as
src/widgets/HeatMap/layers/supportClasses/HeatMapGradientDict.as
src/widgets/HeatMap/layers/supportClasses/HeatMapPoint.as
src/widgets/HeatMap/layers/supportClasses/HeatMapGradientDict.as
src/widgets/HeatMap/events/HeatMapEvent.as
src/widgets/HeatMap/utils/ColorMatrixUtil.as
src/widgets/HeatMap/utils/StringUtil.as
src/widgets/HeatMap/view/ProgressMessage.mxml
src/widgets/HeatMap/view/HeatMapThemeView.mxml
src/widgets/HeatMap/skins/ButtonBarImageSkin.mxml
src/widgets/HeatMap/skins/ButtonBarImageButtonSkin.mxml

Make sure you correct any import references from "com.esri.stl" to "widgets.HeatMap" the import references may vary depending on how you name your widget directory structure.

The UI View components (ProgressMessage.mxml,HeatMapThemeView.mxml) under src/widgets/HeatMap/view
HeatMapThemeView.mxml has a ButtonBar with its skinClass is set to ButtonBarImageSkin.
ButtonBarImageSkin.mxml references the skinClass ButtonBarImageButtonSkin

You'll need to change the skinClass in both (HeatMapThemeView,ButtonBarImageSkin)

from 
skinClass="com.esri.stl.skins.THE_SKIN_CLASSNAME" 
to 
skinClass="widgets.HeatMap.skins.THE_SKIN_CLASSNAME"

You'll also need to modify the references to the assets in ProgressMessage.mxml,HeatMapThemeView.mxml

So you'll need to modify the source files that have references to the namespace xmlns:esri_stl="http://www.esri.com/2010/stl".

You would use local namespaces for the various view, layers, etc.
So in your implementation you would update the following reference like this...

In the ArcGISHeatMapWidget.mxml change the namespace from

xmlns:esri_stl="http://www.esri.com/2010/stl"

xmlns:view="widgets.HeatMap.view.*"

then update the various components that were using the esri_stl namespace

<view:HeatMapThemeView id="heatMapThemeView" 
themeLabel="{heatmapCompLabel}" theme="{heatmapTheme}" 
themeSelectionChanged="themeSelectionChangedHandler(event)" />

If you were using the ArcGISHeatMapLayer class in a widget and were referencing it through mxml rather than ActionScript, you may do something like this...

Add the namespace

xmlns:layers="widgets.HeatMap.layers.*"

change

<esri_stl:ArcGISHeatMapLayer id="heatMapLayer" url="{m_url}" 
         useAMF="true"
         outFields=""
         alpha="0.7"/>

<layers:ArcGISHeatMapLayer id="heatMapLayer" url="{m_url}" 
         useAMF="true"
         outFields=""
         alpha="0.7"/>

If this was helpful, let me know and I can add it to the widget documentation.

Lloyd

AdamRepsher

Hi Lloyd,

I am having one heck of a time implementing this widget! I am attempting to utilize the files in HeatMapWidgetCode\v2\HeatMapWidget\src\HeatMap in my project. I am copying the "HeatMap" folder into my Widgets folder.

I am using the default Flex Viewer 2.4 (only adding widgets-no other customization), Flash Builder 4, 4.1SDK ("use SDK default" setting in Library path-Framework linkage). The ArcGISHeatMapWidget will not build the swf in my bin-debug widget folder. The <esri_stl:ProgressMessage and HeatMapThemeView lines both show errors "Could not resolve esri_stl:HeatMapThemeView to a component implementation."

I can, however, drop the compiled SWF from your HeatMapWidgetCode\v2\HeatMapWidget\bin\bin-2.4 folder into my bin-debug widgets folder, and it works....

Any pointers would be appreciated.

Thanks,
--Adam

LloydHeberlie

After several tries, I got flex viewer heat map working for my own layer. I realized that I had to include the <defaultquery> 1=1 </defaultquery> tag to be able to show all the points and refresh the browser.

I also got some basic query done, thanks to Lloyd's guidance on query, many thanks, guys.

I am going a little bit far now: Can I query based on two different fields (first is type, second is status, in my case). I think I would like to try and find out. Probably would need to add another query in the heatmap widgit or create another similar "widgit"? Are there better/easy ways to do multiple queries?

If you want to make changes to the User Interface like add another input text box or dropdown, then this will require you to change the code and recompile. However if you just want to do a more complex query, then that can be done through the config file. If you modify the query template, then you can add additional parameters such as:

Magnitude > REPLACE_STR and (Num_Deaths >= 10 and Num_Deaths <= 100)

When you would then select "Mag > 2" from the UI, the following query would be issued.

Magnitude > 2 and (Num_Deaths >= 10 and Num_Deaths <= 100)

The REPLACE_STR in the "<querytemplate></querytemplate>" is used to take the values from the "<types></types" in the config file replace the "REPLACE_STR" with the value selected from the dropdown in the UI.

Hopefully this makes sense.

Lloyd

DannyDong

After several tries, I got flex viewer heat map working for my own layer. I realized that I had to include the <defaultquery> 1=1 </defaultquery> tag to be able to show all the points and refresh the browser.

I also got some basic query done, thanks to Lloyd's guidance on query, many thanks, guys.

I am going a little bit far now: Can I query based on two different fields (first is type, second is status, in my case). I think I would like to try and find out. Probably would need to add another query in the heatmap widgit or create another similar "widgit"? Are there better/easy ways to do multiple queries?

LloydHeberlie

I tried to use my own point layer (arcgis server map service) to replace the earthquake layer as the heatmap layer. I replaced the earthquake layer url with my own url, but it returned 0 feature. What else do I need to check or modify? (I tried to remove the query part in the xml) Do I need to recompile the code? So far I just need to display the points (headmap) without query. Maybe later on I would like to query by the points' type information or a frequency attribute.

The viewer looks really nice. I am interested in customizing it for our purpose. I wonder what kind of customization needs recompilation (using flex builder), what customization is just as easy as replacing links or variables and doesn't need to recompile from source code. I am trying to find out myself, but some tips will be very helpful.

Thanks!

Danny,

For your initial interest, you won't need to recompile the code. You just need to make sure that your service is returning geometry. The widget needs to do a query in order to get the points from your service so that it can render the heatmap. The initial query (1=1) will ask the service for all its features (this (number of features) is controlled by a setting on the service itself [this is mentioned in the readme]).

The "default query" (<defaultquery>1=1</defaultquery>) in the config file is what is loaded the first time the widget loads. If you want all the features in your service to display, just leave this with the "1=1" syntax.

Some things to try:
Open your service in the "Services Directory" (http://yourserver/arcgis/rest/<yourFolder>/yourService/MapServer/layerID), and issue a query with the fields you want returned. Make sure the geometry is being returned.

You could use a tool like Firebug (Firefox) or Fiddler to inspect the request/response being issued.

If you eventually want to do some customization, here's some help.
Flash Builder or any other IDE is not required, but will save you time and make you productive. I don't really know anyone that is doing command line compilation (ANT, Maven) for development other than folks that use automated compilation from a centralized source code repository.
Any changes you would like to make, other than the configuration file changes will require recompiling the widget.

Make sure you are not hiding the SHAPE field in your map document.

Lloyd

DannyDong

I tried to use my own point layer (arcgis server map service) to replace the earthquake layer as the heatmap layer. I replaced the earthquake layer url with my own url, but it returned 0 feature. What else do I need to check or modify? (I tried to remove the query part in the xml) Do I need to recompile the code? So far I just need to display the points (headmap) without query. Maybe later on I would like to query by the points' type information or a frequency attribute.

The viewer looks really nice. I am interested in customizing it for our purpose. I wonder what kind of customization needs recompilation (using flex builder), what customization is just as easy as replacing links or variables and doesn't need to recompile from source code. I am trying to find out myself, but some tips will be very helpful.

Thanks!

OscarCastaneda1

Hey Oscar,

I tested this using an Event based layer through ArcGIS Server, and it works. I've attached a document with some info on this. FYI, you WILL NOT get the best performance publishing this way; but it does work. It also most likely only works with mxd based services [that is what I tested], not optimized (msd) based services. Since it is not optimized it is likely that you might not be able to publish event layers as services in the future, but I don't know that for sure.

Good Luck,

Lloyd

I don't know all of the details of your workflow, but here are some other possible suggestions:

You could use the Feature Service in ArcGIS Server to keep your featureclass updated dynamically. Send all your edits through the feature service, and use the feature service as input to the HeatMap widget.

You might possibly be able to use the capabilities of using a QueryLayer to support the dynamic nature of your data, and serve that QueryLayer through a map service in ArcGIS Server.

Thank you Lloyd for your response and taking the time to come up with all related documentation. It's got to be something in my environment because after trying the MXD you provided I'm getting the same results (all points clustered at 0,0). I do agree with you I'm better off if I change my workflow (and using a QueryLayer may be the way to go).
Again, I really appreciate your help at this respect.
Oscar

LloydHeberlie

This widget is Excellent!, unfortunately I haven't been able to make it work with table-based dynamic (Event) map services; when running the widget I get the right number of records from the database but all of them are clustered in the (0,0) coordinates (My data is all in WGS84); however if in the MXD I export the temporary event layer to a feature class and then republish my service, it works perfectly. My operational layers are dynamic by nature so I can't afford the task of being regularly saving to feature classes. I was wondering if there is any workaround for this?
Much appreciated.
Oscar

Hey Oscar,

I tested this using an Event based layer through ArcGIS Server, and it works. I've attached a document with some info on this. FYI, you WILL NOT get the best performance publishing this way; but it does work. It also most likely only works with mxd based services [that is what I tested], not optimized (msd) based services. Since it is not optimized it is likely that you might not be able to publish event layers as services in the future, but I don't know that for sure.

Good Luck,

Lloyd

I don't know all of the details of your workflow, but here are some other possible suggestions:

You could use the Feature Service in ArcGIS Server to keep your featureclass updated dynamically. Send all your edits through the feature service, and use the feature service as input to the HeatMap widget.
You might possibly be able to use the capabilities of using a QueryLayer to support the dynamic nature of your data, and serve that QueryLayer through a map service in ArcGIS Server.

Forums-Heatmap-EventLayer.zip

OscarCastaneda1

This widget is Excellent!, unfortunately I haven't been able to make it work with table-based dynamic (Event) map services; when running the widget I get the right number of records from the database but all of them are clustered in the (0,0) coordinates (My data is all in WGS84); however if in the MXD I export the temporary event layer to a feature class and then republish my service, it works perfectly. My operational layers are dynamic by nature so I can't afford the task of being regularly saving to feature classes. I was wondering if there is any workaround for this?
Much appreciated.
Oscar

LloydHeberlie

Is there a way to use equal(=)and not &gt(>), and is there a way to use a field that is string and not an integer or double? Thanks.

You sure can.

<querytemplate>FIELD_NAME = 'REPLACE_STR'</querytemplate>
<types>VAL1,VAL2,VAL3,VAL4</types>
<type_descs>Name = 1,Name = 2,Name = 3,Name = 4</type_descs>

The type_descs are what show up as the label in the dropdown list, and the types are the values associated with the label. When you select one of the options from the list the query template takes the text REPLACE_STR and replaces it with the value you selected from the option list.

For example: if you selected "Name = 1" from the dropdown, then the query executed would be FIELD_NAME = 'VAL1'.

Hope this helps.

Lloyd

CarlAlexander

Is there a way to use equal(=)and not &gt(>), and is there a way to use a field that is string and not an interger or double? Thanks.

LloydHeberlie

Lloyd, great widget! thanks for sharing it.
I managed to implement the source code in to my project, haven't made any customizations yet. Right now I just wanted to try it out, but for later projects I might want to use another data source than a mapservice from ArcGIS Server, lets say I get some point data somehow and put them into a graphiclayer for example. How much rewriting of the source code would I have to do to use that as an input instead? I haven't look at the code much yet but I'm guessing it will be really tricky for someone with limited knowledge of flex/actionscript.
/Mattias

Hey Mattias,

You should be able to use the HeatMapLayer class and version 1 of the widget to get you started. You will need to modify the code to do what need, but it is pretty straightforward (assuming your are comfortable doing some coding [ActionScript+MXML]). Take a look at the function named heatmap_QueryTask_executeCompleteHandler in HeatMapWidget.mxml, you can find this in the download under HeatMapWidgetCode\v1\HeatMapWidget\src\HeatMap.

What you are wanting to accomplish by using a non-ArcGIS Server datasource is pretty easy to do with version 1 of the widget included in the download. Here's how it works. You'll need to fetch your points from some datasource, web service, etc. You'll need to make sure that your points are in the same projection as the map you are using. Create a new instance of the HeatMapLayer (also included in the source [version 1]). You then create an Array of HeatMapPoints where each item in the array is a HeatMapPoint. Then set the HeatMapLayer.dataProvider = heatMapPointsArr;

So, what I'm telling you is that there are two classes. HeatMapLayer was the original class used in version 1 of the widget, it was more generic and not deeply integrated with an ArcGIS Server service. This was the original source code that Mansour provided on his blog. ArcGISHeatMapLayer is the version 2 class that I created that still uses the same source code from Mansour to generate the heatmap, but is deeply integrated with an ArcGIS Server service (TimeAware, Dynamic query functionality, etc).

Good Luck,

Lloyd

mattias_j

Lloyd, great widget! thanks for sharing it.
I managed to implement the source code in to my project, haven't made any customizations yet. Right now I just wanted to try it out, but for later projects I might want to use another data source than a mapservice from ArcGIS Server, lets say I get some point data somehow and put them into a graphiclayer for example. How much rewriting of the source code would I have to do to use that as an input instead? I haven't look at the code much yet but I'm guessing it will be really tricky for someone with limited knowledge of flex/actionscript.
/Mattias

MichaelHarvey

It was simply a design decision, there is a property on the TimeSlider named thumbCount. You can see how it works in this sample Time Slider with 2 thumbs. Unfortunately you would need to recompile the widget in order to make this change, maybe it is something I can do in the next version (whenever that would be) through the configuration file.

Lloyd

If you ever do, be sure to post it, that function would be great.

LloydHeberlie

Works great.

Question about the heat map time line function.

The residual data does not leave the map as the slider is progressed through the date range.

eg, I have 10 various xy points for 1980, then another various 10 points for 1981, but as I move the slider from 1980 to 1981 I no longer have 10 points only I have a cumulative 20 points and thus the heat spot increases. Is this by design? or can it be changed to only reflect the data as requested by the given date range of the slider request.

Cheers

Mick.

It was simply a design decision, there is a property on the TimeSlider named thumbCount. You can see how it works in this sample Time Slider with 2 thumbs. Unfortunately you would need to recompile the widget in order to make this change, maybe it is something I can do in the next version (whenever that would be) through the configuration file.

Lloyd

LloydHeberlie

I tried updating my application, but got 2 errors:
<esri_stl:ArcGISHeatMapLayer id="heatMapLayer" url="{m_url}"
One for the heatmaptest and the other for the heatmaptime test mxml

Can anyone help?
Thanks.

I'm not sure what you are doing? Are you compiling the widget from the source code I posted? The HeatMapTest.mxml and HeatMapTimeTest.mxml are just sample applications that illustrate the functionality of the ArcGISHeatMapLayer.as class. They are not used in the widget.

When you are using the source code, unless you are compiling your own library project with your namespace (which is what I use and a little more complex than can be explained here); you just need to reference the location where you placed the source code.

You'll need to refactor the source code specifically you'll get errors for the package name (com.esri.stl.ags and any subpackages) as well as the namespace ( xmlns:esri_stl="http://www.esri.com/2010/stl") that I used when compiling the library project. If you put the source code into a package name com.mycustomsourcecode then in your app would look like this below.

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
      xmlns:s="library://ns.adobe.com/flex/spark" 
      xmlns:mx="library://ns.adobe.com/flex/mx" 
      minWidth="955" minHeight="600" 
      xmlns:esri="http://www.esri.com/2008/ags" 
      xmlns:my_custom_sourcecode="com.mycustomsourcecode"
      backgroundColor="0x8080C0">
 <esri:Map id="map" wrapAround180="true" >
  <esri:ArcGISTiledMapServiceLayer url="{YourBasemapURL}" visible="true"/>
  <my_custom_sourcecode:ArcGISHeatMapLayer id="heatMapLayer" url="{YourHeatmapURL}" useAMF="true" outFields="" alpha="0.7"/>
 </esri:Map>
</s:Application>

Hope this helps.

Lloyd

MichaelHarvey

Works great.

Question about the heat map time line function.

The residual data does not leave the map as the slider is progressed through the date range.

eg, I have 10 various xy points for 1980, then another various 10 points for 1981, but as I move the slider from 1980 to 1981 I no longer have 10 points only I have a cumulative 20 points and thus the heat spot increases. Is this by design? or can it be changed to only reflect the data as requested by the given date range of the slider request.

Cheers

Mick.

JeffreyUtter

I tried updating my application, but got 2 errors:
<esri_stl:ArcGISHeatMapLayer id="heatMapLayer" url="{m_url}"
One for the heatmaptest and the other for the heatmaptime test mxml

Can anyone help?
Thanks.

DanielOchoa

Lloyd,

Got it working like a charm! Its a VERY nice widget.

Just one question - the record set I have the widget pointing at has about 30,000 records, yet the widget reports "1000 features contained", even when zoomed out to the entire record set. However, the heat graphics produced seemingly covers the entire dataset and displays correct information, despite the "1000" number. Any explanation for this? Its probably me not understanding something, so any answer would be appreciated.

Thanks again!

~ D

Never mind, answered my own question - but to anyone else who may have the same question I did - remember to change the "Maximum Number of Records Returned By Server" value under "Map Service Properties" to match the amount of data you want this widget to measure.... 😉

DanielOchoa

I'll plug this in ASAP. Thanks!

LloydHeberlie

Sample updated to support ArcGIS Viewer for Flex 2.4
ArcGIS Viewer for Flex HeatMapWidget

Sorry about that.

Lloyd

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