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05-27-2014
10:34 AM
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Hi all,
I am trying to create a GIS data portal that allows users to select one out three diffent methods for data extraction.
1) extract by graphic extent
2) extract by extent of a county
3) extract by unit (calfire)
Here is my problem. I am using a switch statement that allow the users to select either one of these methods independently as shown on this thread.
However, when I trigger the either one of the cases within my function by pushing on a download button. It seems like the GPtool cant access any input data for some reasons.
errors I get for each of the functions described above :
My code:
Any idea why I get these errors?
I am trying to create a GIS data portal that allows users to select one out three diffent methods for data extraction.
1) extract by graphic extent
2) extract by extent of a county
3) extract by unit (calfire)
Here is my problem. I am using a switch statement that allow the users to select either one of these methods independently as shown on this thread.
However, when I trigger the either one of the cases within my function by pushing on a download button. It seems like the GPtool cant access any input data for some reasons.
errors I get for each of the functions described above :
TypeError: Unable to get property 'geometry' of undefined or null reference TypeError: Unable to get property 'style' of undefined or null reference TypeError: Unable to get property 'style' of undefined or null reference
My code:
var extractMethod = "extractByPoly"; var extractMethod = "extractByCounty"; var extractMethod = "extractByUnit"; function myFunction() { //var extractMethod = "extractByPoly"; //var extractMethod = "extractByCounty"; //var extractMethod = "extractByUnit"; switch (extractMethod) { default: //function extractData() { //get clip layers var clipLayers = []; if (registry.byId("layer1").get("checked")) { clipLayers.push("SRA"); } if (registry.byId("layer2").get("checked")) { clipLayers.push("Burn"); } if (clipLayers.length === 0 || map.graphics.graphics.length === 0) { alert("Select layers to extract and draw an area of interest."); return; } var featureSet = new FeatureSet(); var features = []; features.push(map.graphics.graphics[0]); featureSet.features = features; var params3 = { "Layers_to_Clip": clipLayers, "Area_of_Interest": featureSet, "Feature_Format": registry.byId("formatBox").get("value") }; domStyle.set(loading2, "display", "inline-block"); gp.submitJob(params3, completeCallback, statusCallback2, function (error) { alert(error); domStyle.set(loading2, "display", "none"); }); //} break; case "extractByCounty": //function executeQueryTask(county) { var clipLayers = []; if (registry.byId("layer1").get("checked")) { clipLayers.push("SRA"); } if (registry.byId("layer2").get("checked")) { clipLayers.push("Burn"); } if (clipLayers.length === 0) { alert("No layers to clip, please select a layer you would like to clip..."); return; } var county = document.getElementById("sel_county").value var unit = document.getElementById("sel_unit").value var queryTask = new QueryTask("http://webgisdevint1/arcgis/rest/services/Alex_Try/Counties/MapServer/0"); var query = new Query(); query.returnGeometry = true; query.outFields = ["NAME_PCASE"]; query.where = "NAME_PCASE = '" + county + "'"; query.outSpatialReference = map.spatialReference; queryTask.execute(query, function (featureSet) { var AOI = featureSet.features[0].geometry; var graphic = new Graphic(AOI); var features = []; features.push(graphic); var fSet = new FeatureSet(); fSet.features = features; var params = { "Layers_to_Clip": clipLayers, "Area_of_Interest": fSet, "Feature_Format": registry.byId("formatBox").get("value") }; domStyle.set(loading, "display", "inline-block"); gp.submitJob(params, completeCallback, statusCallback, function (error) { alert(error); domStyle.set(loading, "display", "none"); }); }); //} break; case "extractByUnit": //function executeQueryTask1(unit) { var clipLayers = []; if (registry.byId("layer1").get("checked")) { clipLayers.push("SRA"); } if (registry.byId("layer2").get("checked")) { clipLayers.push("Burn"); } if (clipLayers.length === 0) { alert("No layers to clip, please select a layer you would like to clip..."); return; } var unit = document.getElementById("sel_unit").value var queryTask = new QueryTask("http://webgisdevint1/arcgis/rest/services/Alex_Try/Layers/MapServer/1"); var query = new Query(); query.returnGeometry = true; query.outFields = ["UNITCODE"]; query.where = "UNITCODE = '" + unit + "'"; query.outSpatialReference = map.spatialReference; queryTask.execute(query, function (featureSet) { var AOI = featureSet.features[0].geometry; var graphic = new Graphic(AOI); var features = []; features.push(graphic); var fSet = new FeatureSet(); fSet.features = features; var params2 = { "Layers_to_Clip": clipLayers, "Area_of_Interest": fSet, "Feature_Format": registry.byId("formatBox").get("value") }; domStyle.set(loading1, "display", "inline-block"); gp.submitJob(params2, completeCallback, statusCallback1, function (error) { alert(error); domStyle.set(loading1, "display", "none"); }); }); //} } }Any idea why I get these errors?
Solved! Go to Solution.
32 Replies
06-03-2014
03:10 PM
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Since your app is an internal application, it's really hard for us on the outside to troubleshoot what you're seeing. Your description makes me think there's a "cart in front of the horse" situation whereby part of your code is trying to use an object before it's returned from a query. In other words, "e" might be null because the code is accessing it before it gets populated. I've been tripped up by this type of situation before and it's frustrating to remedy.
I tried pulling out your dependencies on the code and from what limited things I can do, I'm not experiencing an error like you posted. Line 205 also doesn't seem to make sense in the code I have in front of me. Where is that? Is that in the addGraphic function we just added a post or two ago?
I tried pulling out your dependencies on the code and from what limited things I can do, I'm not experiencing an error like you posted. Line 205 also doesn't seem to make sense in the code I have in front of me. Where is that? Is that in the addGraphic function we just added a post or two ago?
06-03-2014
03:31 PM
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Since your app is an internal application, it's really hard for us on the outside to troubleshoot what you're seeing. Your description makes me think there's a "cart in front of the horse" situation whereby part of your code is trying to use an object before it's returned from a query. In other words, "e" might be null because the code is accessing it before it gets populated. I've been tripped up by this type of situation before and it's frustrating to remedy.
I tried pulling out your dependencies on the code and from what limited things I can do, I'm not experiencing an error like you posted. Line 205 also doesn't seem to make sense in the code I have in front of me. Where is that? Is that in the addGraphic function we just added a post or two ago?
You are right since it's not a public app it must be had to see what is going on. I attached my app with only the latest code and what I think is necessary for it to make it run. Some images might be missing. The only thing you wont have access to are the GP tool but you can use the sample GP tool here from this code, it does the same thing as mine:
https://developers.arcgis.com/javascript/jssamples/gp_clipasync.html
And you wont be able to access my two data layers unit and counties
I think the error message is referring to an error that occured in the ESRI API 3.9. Maybe because of the misuse of the API in my code.
Thank you for all the time spent on this. I really appreciate. I am learning a lot thanks to you and the other guys who helped me.
Alex
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