Latest Contributions by JeffreyDege

I'm writing a WPF application, in C#, using ArcObjects. I have an ESRI.ArcGIS.Controls.AxMapControl on my form, and I'm trying to draw some graphics elements on top of it. The map I'm developing with is a customer-provided mdf of the state of Georgia. Over the top of this, I need to display some markers and some text. It's taken a while, but I've figured out how to do this, except that the image and the text scales with the map. If it looks good at one zoom, it's way too big or way too small at others. What I'd like is for the marker and text to be placed at a lat/long, so that it moves as the map is panned, but at a fix size that doesn't change as the map is zoomed in and out. I'd thought that setting ScaleText = false would solve this for the text, but it doesn't seem to, and I'm not seeing any method for doing this with markers. My current attempt:     public void addMarker(IMap map, double x, double y, string text, string imagePath)     {         var point = new PointClass() {X = x, Y = y};         var pictureMarkerSymbol = new PictureMarkerSymbolClass         {             Size = 15,             BitmapTransparencyColor = new RgbColorClass             {                 Red = 0,                 Green = 0,                 Blue = 0             }         };         pictureMarkerSymbol.CreateMarkerSymbolFromFile(esriIPictureType.esriIPictureBitmap, imagePath);         var markerElement = new MarkerElementClass         {             Symbol = pictureMarkerSymbol,             Geometry = point         };         var textElement = new TextElementClass         {             Text = text,             ScaleText = false,             Symbol = new TextSymbolClass             {                 XOffset = 40,                 Size = 10             }         };         ((IElement) textElement).Geometry = point;         (map as IGraphicsContainer)?.AddElement(((IElement)textElement), -1);         (map as IGraphicsContainer)?.AddElement(((IElement)markerElement), 0);         (map as IActiveView)?.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);     } I recognize that the above is stylistically very different from the usual ESRI examples. I find the typical ESRI example almost unreadable. If you strip the more recent C# syntactic sugar from the above, you get the following, which should (and does, in my testing), behave identically:     public void addMarker(IMap map, double x, double y, string text, string imagePath)     {         IPoint point = new PointClass();         point.X = x;         point.Y = y;         IRgbColor rgbColorClass = new RgbColorClass();         rgbColorClass.Red = 0;         rgbColorClass.Green = 0;         rgbColorClass.Blue = 0;         IPictureMarkerSymbol pictureMarkerSymbol = new PictureMarkerSymbolClass();         pictureMarkerSymbol.Size = 15;         pictureMarkerSymbol.BitmapTransparencyColor = rgbColorClass;         pictureMarkerSymbol.CreateMarkerSymbolFromFile(esriIPictureType.esriIPictureBitmap, imagePath);         IMarkerElement markerElement = new MarkerElementClass();         markerElement.Symbol = pictureMarkerSymbol;         IElement eMarkerElement = (IElement) markerElement;         eMarkerElement.Geometry = point;         var textSymbol = new TextSymbolClass();         textSymbol.XOffset = 40;         textSymbol.Size = 10;         var textElement = new TextElementClass();         textElement.Text = text;         textElement.ScaleText = false;         textElement.Symbol = textSymbol;         IElement eTextElement = (IElement) textElement;         eTextElement.Geometry = point;         IGraphicsContainer gcMap = (IGraphicsContainer) map;         gcMap.AddElement(eTextElement, -1);         gcMap.AddElement(eMarkerElement, 0);         IActiveView avMap = (IActiveView) map;         avMap.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);     } Anyone have any ideas how I can make this marker and text draw at a fixed size independent of zoom? ... View more

I'm writing a WPF applicating, in C#, using ArcObjects. I have an ESRI.ArcGIS.Controls.AxMapControl on my form, and I'm trying to draw some graphics elements on top of it. The map I'm developing with is a customer-provided mdf of the state of Georgia. I'm trying an example I found here: http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#//0001000001rv000000     public void AddTextElement(IMap map, double x, double y)     {         IGraphicsContainer graphicsContainer = map as IGraphicsContainer;         IElement element = new TextElementClass();         ITextElement textElement = element as ITextElement;         //Create a point as the shape of the element.         IPoint point = new PointClass();         point.X = x;         point.Y = y;         element.Geometry = point;         textElement.Text = "Hello World";         graphicsContainer.AddElement(element, 0);         //Flag the new text to invalidate.         IActiveView activeView = map as IActiveView;         activeView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);     } It took while to figure out how to project the lat/long of Atlanta to the coordinate system of the map, but I'm pretty sure that I've got it right. The x/y values I'm passing into AddTextElement() are clearly within the Atlanta area, according to the Location data I see when I use the Identify tool on the map. But I'm not seeing the text. Everything seems to be working correctly, but I'm not seeing the text. I can see a number of possibilities: - The layer I'm adding the TextElement to isn't visible, or doesn't exist. - I need to apply a spatial reference system to the point I'm setting as the TextElement's geometry - The text is drawing fine, but there's something wrong with the font - it's invisibly small, or in a transparent color, etc. Haven't a clue, which. I was hoping there was something obvious I was missing. --- More info --- I've been looking at a different tutorial: http://resources.esri.com/help/9.3/arcgisengine/dotnet/7bd52ed1-18ae-4aa7-8cde-e9eaed9537fe.htm This includes a custom control that writes the current date to the map, at the point that you click it with the mouse:     public override void OnMouseDown(int Button, int Shift, int X, int Y)     {         //Get the active view.         IActiveView activeView = m_hookHelper.ActiveView;         //Create a new text element.         ITextElement textElement = new TextElementClass();         //Create a text symbol.         ITextSymbol textSymbol = new TextSymbolClass();         textSymbol.Size = 25;         //Set the text element properties.         textElement.Symbol = textSymbol;         textElement.Text = DateTime.Now.ToShortDateString();         //Query interface (QI) for IElement.         IElement element = (IElement)textElement;         //Create a point.         IPoint point = new PointClass();         point = activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);         //Set the element's geometry.         element.Geometry = point;         //Add the element to the graphics container.         activeView.GraphicsContainer.AddElement(element, 0);         //Refresh the graphics.         activeView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);     } This actually succeeds in writing text to the map, but it confuses me. When I click on the map, and enter into OnMouseDown, X is 183 and Y is 266 - clearly pixel coordinates. (That they are of type int would suggest that.) The but after point is created, by calling DisplayTransformation.ToMapPoint(), it has X and Y of 2.5048801369863014 and 8.3338184931506856. That's not lat/long and it's not map coordinates. But when I use that as my TextElement's geometry and add it to the GraphicsContainer, it does display the text on the map. Are these some sort of screen coordinates? If so, how do I convert lat/long to screen coordinates? And if they are screen coordinates, why doesn't my first example work, when I use the screen coordinate values to locate the text? ---- So, I added the custom control from the second example to the map on the first. Noticed two things: 1. The coordinates of the point returned by activeView.ScreenDisplay.DisplayTransformation.ToMapPoint() appear to be map coordinates. 2. I still don't see the text appear on the map. This suggests to me that the problem isn't coordinates, or fonts, or colors, but that there isn't an active graphics layer on the map. How do I add one? ---- At this point, I have to say "never mind". Turns out my problem is scaling. My text is being drawn on the map, only at a scale that is invisible unless I zoom in considerably. My "Hello, world" text is drawn at a fixed size, on the map, and scales with the map. With a default size of only a hundred feet or so, which isn't visible when zoomed to see the entire state. If I set the size to 25, it's a bit larger, but still essentially invisible. I need to set it to 25000 before its legible on the map. What I need, now, is to figure out how to draw markers and text on the map at a size that is independent of the zoom level. And that's another question, entirely. ... View more

I'm building a windows application that uses ESRI.ArcGIS.Controls.AxMapControl. I've figured out how to create the map, and to populate it from a .mxd. Now I need to programmatically draw some markers and geometries on the map. I have a set of objects - in memory, not in some external map source - each of which contains a pair of coordinates in latitude/longitude, an ID, and a bit of data. Basically, these represent jobs that the user needs to do. I need to display a marker, at each of the lat/longs, that displays the ID, and has a popup form that displays the data. I need to be able to open or close the popup form, from my program. I need to be able to change the data displayed in the form, I need to be informed, when the user clicks on a marker, so that I can do some stuff in my program based on which job he clicked. I'm not new to mapping, I've done this sort of thing with OpenLayers, and with Leaflet, and with Telerik's WPF control. But ESRI provides a huge selection of capabilities, but nothing I've seen yet jumps out as the obvious way to approach this sort of problem. Any ideas? ... View more

We have an old VB6 application that uses ESRI's VB map control to display map data that our customers' install locally on the laptops that are running the app. I'm working on a XAML/WPF replacement using ArcGIS runtime for .NET, and I'm not having much luck getting started. The customers use maps with varying degrees of sophistication, but some make extensive use of ArcMap capabilities, and configure varying numbers of controls within the map - feature queries, searches, distance measurement, etc. It's not clear to me to what degree ArcGIS runtime for .NET supports these. To date, I've not even been able to load a map. Or, rather, I've not been able to create a map package. The customer who needs this first has sent me an .mxd file, with accompanying .gsd's. When I try to create a map package with runtime support, in ArcMap 10.4, I get errors: 00174 Label expression  uses VBScript, this is not support in the ArcGIS Runtime 24067 Annotation expression from annotation class "Default" uses VBScript, this is not supported in the ArcGIS Runtime 10001 Layer's data source has a different projection [NAD_1983_Lambert_Conformal_Conic] than the data frame's projection 20005 Annotation feature class contains a symbol in the symbol collection with the Rotate With Transform option disabled What do I do next? Do I ask the customer to rework their map data to not use VBScript? How much work are we asking the customer to do, to make their data work with ArcGIS runtime, when it worked just fine with the old VB control? I have to assume they have a reason for using label and annotation expressions. Are there alternatives that will work with 10.4 ArcGIS runtime, that will still work in their existing 10.0 ArcGIS environment? How do they make these changes? Is there some way of automating the transformation? Is there some alternative method for serving the map data that doesn't have these limits?  If we have a local copy of ArcGIS running on the laptop, serving the data, could we display it using the Runtime .NET control? ... View more

I'm trying to get Arc Map 10.4 running, from a new installation of ArcGIS_Desktop on Windows 10. I'd initially installed the free trial, then uninstalled, and installed ArcGIS_Desktop_104_149411.exe. The installation worked fine, and the Authorization Wizard seems to have worked. I see EDN ArcGIS for Desktop Basic listed in ArcGIS Administrator, with version 10.1-10.4, marked as Installed, and Authorized, with an expiration of 01-Dec-2016. But when I run ArcMap 10.4, I get a splash screen showing the message "Loading Document..." for about 30 seconds, then it goes away. I filed a support ticket with ESRI last week, but have had no response. Is there some sort of log that ArcMap might be writing to, that would give me a hint as to what is going wrong? I've tried un-installing, and re-installing, and it's made no difference. ... View more

I have a Leaflet map in which I am displaying an Esri ArcGIS REST layer, using L.esri.dynamicMapLayer(). The code that initializes this layer is passed the URL to the service and a comma-separated list of layers to be displayed - which service and which layers is configured by the user. My task is to provide a means by which the user can click on the map and obtain feature information for the nearby facilities. I had been looking at L.esri.query(), which was simply inappropriate. Looking at L.esri.DynamicMapLayer, I see that it has a function identify(), which should return an IdentifyFeatures object. But I'm not having any luck with using it. Everything I try results in a "bbox must be specified" error. The documentation for dynamicMapLayer is here: dynamic-map-layer.html​ It includes: Returns a new L.esri.services.IdentifyFeatures object that can be used to identify features on this layer. Your callback function will be passed a GeoJSON FeatureCollection with the results or an error. dynamicMapLayer.identify() .at(latlng, latlngbounds, 5) .run(function(error, featureCollection) { console.log(featureCollection); }); Note that .at() is called with a latlong object, a latlngbounds object, and "5". But the documentation for the IdentifyFeatures object is here: identify-features.html And it's documentation for at() is: at( latlng) this Identifies feautres at a given Only one argument. No second bounds argument, or third numeric argument, simply a LatLng. The LatLng links to the Leaflet code, indicating that it's an L.latLng object, containing a lat and a lng property. The example code for IdentifyFeatures is even more confusing: L.esri.identifyFeatures({ url: 'http://sampleserver6.arcgisonline.com/arcgis/rest/services/WorldTimeZones/MapServer' }) .on(map) .at([45.543, -122.621]) .layers('visible:1') .run(function(error, featureCollection, response){ console.log("UTC Offset: " + featureCollection.features[0].properties.ZONE); }); Here, we're not passing a L.latLng object, we're passing an array. What gives? How am I supposed to use this? ... View more