ArcObjects is a set of COM-based APIs from ESRI Inc. that are used in several of their products including ArcGIS Desktop, ArcGIS Engine and ArcGIS Server.

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81
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5answers
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How do I access ArcObjects from Python?

I would like to be able to script some things that are not exposed via arcgisscripting or ArcPy. How do I access ArcObjects from Python?
31
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4answers
4k views

Performance of ArcGISScripting and large spatial data sets

I am currently writing a python script using the arcgisscripting module to process a reasonably large data set (~10,000 records in total) normalised over a small number of tables, 8 in total. The ...
20
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3answers
879 views

Are there any OpenSource ArcObjects Projects?

One of the major benefits of developing GIS applications based on opensource libraries, is that many projects spring up on top of them which are also opensource. Well designed opensource projects ...
16
votes
10answers
4k views

Getting started with Arcobjects

What is the best route or place to get started with arcobjects if one is not a developer and not aiming to become a developer? I've been using gis professionally for a long time, almost two decades, ...
15
votes
2answers
2k views

Calling arcpy/python from .NET?

Are there any available examples that show how python can be integrated into a .NET ArcGIS Addin or Extension? I have a series of python scripts that I would like to call from form events (e.g. button ...
15
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6answers
7k views

Converting between Esri Geometry and WKT using ArcObjects?

It seems like there is no means of converting an ArcObjects geometry to the Well-Known Text representation (and vice versa) in ArcGIS ArcObjects API. The only thing I was able to find is conversion to ...
15
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5answers
3k views

How can I find the farthest point from a set of existing points?

I have a set of points as a shapefile and I want to find (the coordinates) of a new point which will have the longest possible distance from each of the existing points. Is that possible? If yes, is ...
15
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3answers
2k views

Algorithm to find out points of inflection for a polyline

I am trying to find out the points of inflection , i.e. points where the curves in a line start and end. If you look at the image, the green line may be a road or a stream, and the black points are ...
15
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3answers
3k views

ArcObjects: Memory leak in IFeatureClass.Search (only on SDE with direct connect)

UPDATE 6/30/11: ESRI Support say they have reproduced the issue and have opened a bug report (NIM070156). I have determined that there is a memory leak (in unmanaged heap memory) that occurs when a ...
14
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5answers
3k views

Is Hillshade option in ArcMap rubbish or is it me?

Here is a pretty pic of the raster I am using - with no effects applied - just the color ramp and historgram adjusted to show out all the relief - all be it in a very 2D way! I have a raster layer ...
13
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8answers
4k views

ArcObjects Resources

What are the best books/web sites for C# development with ArcObjects? The ArcGIS Resource Center is very helpful, but I am trying to find sources with more examples. Thanks
13
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2answers
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How can I create weighted Thiessen polygons?

I have a point shape file and I create Thiessen (Voronoi) polygons programmatically using this scripting syntax: CreateThiessenPolygons_analysis (in_features, out_feature_class, fields_to_copy) ...
13
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1answer
1k views

How to get selected Features/Geometry from Windows Clipboard in ArcMap/C#?

I have a custom tool in ArcMap 10. The Workflow is the following: Select Features in a Layer with the "Select Features by Rectangle" tool Copy the Features to the Clipboard using STRG+c Select the ...
12
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5answers
3k views

What are the rules for releasing ArcObjects from memory in .NET?

Do I need to release each object? Is some memory management handled for me? ArcEngine 10, VS2010 C#
12
votes
3answers
2k views

What is the future of ArcGIS web development ? Is it JavaScript and HTML5? [closed]

I want to know about the future of ArcGIS web development; is it HTML5? I used to work with ArcObjects and .NET Web ADF so what is the best technology I must follow, especially when I know that ...
12
votes
1answer
443 views

Hyperlink tool use in ArcEngine

I'm having some difficulties using the hyperlink tool (ControlsMapHyperlinkTool) in ArcEngine. Does anyone have any experience with it? It looks like it behaves correctly except that every time a ...
12
votes
1answer
446 views

Scale in printed map (mxd) is different in code to manual printing

This question is related in part to a previous question I have asked. I have tried printing an A3 mxd with the Print Active View code as published by ESRI and have changed only one line of code and ...
11
votes
12answers
8k views

Learning .NET for ArcGIS (mainly Desktop) use?

I have basic programming skills (I program simple vba python and lisp scripts and had gone through a java course a long time ago), but it seems to me (judging by ESRI publications) that there is no ...
11
votes
1answer
754 views

Bug in F******** spatial relation? (I'm not cussing)

I would expect ISpatialFilter.SpatialRelDescription to behave consistently with IRelationalOperator.Relation. However, when I run the code below, I get: Total features : 44368 Count1: 9 ...
10
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6answers
2k views

How do I iterate through every cell in a continuous raster?

See this link for more details. The Problem: I want to loop through a continuous raster (one that has no attribute table), cell by cell, and get the value of the cell. I want to take those values ...
10
votes
2answers
1k views

How to unit test ArcObjects with Mocking?

I'm a huge fan of unit testing, but still make use of a FGDB to grab features for running unit tests against when using the ArcObjects framework. Is anyone successfully using mocking against thinks ...
10
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2answers
2k views

Avoiding fails from ArcObjects geoprocessing with .NET?

There are some nice features in ArcToolbox we can use, but for some reason, this is NOT working properly. It doesn't even throw me an error. My software is running inside ArcMap, so no need to ...
10
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2answers
1k views

ArcGIS 10 add-in: Top-level exception handling

The ArcGIS 10 add-in I'm working on is pretty simple -- just a tool control and a dockable window. I'm handling the specific exceptions I anticipate occuring at the source and throwing everything ...
10
votes
1answer
278 views

ArcObjects equivalent to ArcMap Flip button?

In an ArcMap extension, I need to flip multiple lines from a selection. The ArcMap Flip button only allows you to flip one feature at a time. What's the ArcObjects equivalent to ArcMap's Flip ...
10
votes
1answer
901 views

Programmatically determine ArcGIS Layer(*.lyr) file version

I've been through IStorage, Microsoft Compound File Spec, ArcObjects deserialization etc. trying to detect the .lyr file version. Using ArcObjects, I can get at the Layer properties, data source, ...
10
votes
4answers
576 views

Does SHAPE_Length take into account elevation values?

Does the Shape_Length attribute take into account the elevation? For instance, if I have 3 points: A, B, and C A.X = 10 A.Y = 10 A.Z = 10 B.X = 10 B.Y = 10 B.Z = 50 C.X = 0 C.Y = 0 C.Z = 10 Then I ...
10
votes
1answer
3k views

Is there a line symbology that also shows vertices?

Is there such a thing as a line/vertices symbology? If not a workaround? In some situations, particularly when editing, I would like to see my lines as well as all the vertices similar to the effect I ...
10
votes
2answers
2k views

ArcMap extension 9.3 vs 10

I have updated our ArcMap extension to work with ArcMap 10 - mainly just change reference from ESRI.ArcGIS.ADF to ESRI.ArcGIS.ADF.Local and set value of 'Specific Version' property for all references ...
10
votes
1answer
959 views

Implement ArcGIS Custom Features with C#?

Is it possible to implement custom features in .NET? If so, how? I suspect the issue is being able to do COM aggregation with .NET, but I can't find anything on that ... Does anyone know if it is ...
9
votes
3answers
6k views

How does ArcGIS compute the distance between two points with a non-equidistant projection?

This is a follow-up question to my previous one, Can you suggest some well-written introductory texts about coordinate system projections? Let's assume I'm working with the CH1903 map projection, ...
9
votes
4answers
3k views

Connecting line features and determining the length of the longest line

I have a line feature (see image) representing a river that I created using the Stream_to_Feature tool. The attribute table contains several records representing different lines - the problem is the ...
9
votes
6answers
4k views

Is there an existing library for converting ArcGIS Features to Json?

Is there an existing library for converting ArcGIS IFeature types to and from Json/GeoJson?
9
votes
2answers
297 views

Custom implementation of ArcGIS function

I would like to find out what it takes to create a custom implementation of an ArcGIS function. In particular, I would like to implement GeoAnalyst.ISurfaceOp2.Visibility() in order to get it to run ...
9
votes
2answers
426 views

How to use IRelationalOperator2 and GeometryBag

I want to use the IsNear method of IRelationalOperator2. The documentation says that GeometryBag supports the IRelationalOperator2 interface. But this just doesn't work and results in an exception ...
9
votes
1answer
3k views

Editing shapefile in ArcMap programmatically?

Is this something that can be done? For instance if I created an overlay on a map and saved it as a shape file, I want to go and edit this (pre-existing file.) overlay...Either add points/remove ...
9
votes
1answer
1k views

Arcobjects in Python: assign interface to objects with feature (shape) geometry

I am trying to use ArcObject in Python. I do have problem with assigning an interface (i.e. IZ.InterpolateZsBetween) to my object with geometry data, code is: from Comtypes.client import ...
9
votes
1answer
944 views

Referring to NaN or ±∞ (special floating point values) in ArcMap definition queries?

I have by chance discovered how ArcMap displays special floating point values to the user. +∞ (positive infinity) is displayed as 1.#INF –∞ (negative infinity) would supposedly be displayed as ...
8
votes
2answers
595 views

ArcObjects diagram/object model?

Is there an existing object model diagram for ArcObjects? Something that can be printed out as a large poster.
8
votes
2answers
967 views

C# version for ArcObjects 9.3

Can I use C# 4.0 with the target framework set to .NET 3.5 to develop an extension for ArcMap 9.3? Or does it have to be C# 3.0 or earlier?
8
votes
3answers
9k views

How to create a button in Arcmap 10 to run a Python program?

I have a script that I want to run within ArcMap when a button in a toolbar is clicked, and so far I have only been able to make the script into a script tool. I need it to run as a command, not as a ...
8
votes
1answer
986 views

Getting units from ISpatialReference of ArcObjects?

How do I get the units (meter/feet) from an ISpatialReference object in ArcObjects?
8
votes
2answers
1k views

Can custom map tiles be consumed via ArcObjects within my ArcGIS 10 Desktop AddIn?

Can I programmatically consume and render custom map tiles in ArcMap via our ArcGIS 10 Desktop AddIn? The AddIn is built using the ArcObjects SDK for C#/.NET and ArcGIS 10. Pulling and rendering map ...
8
votes
2answers
844 views

What are the implications of using .NET Generics to store ArcObjects?

I'm wondering what are the implications of using Generic types in .NET to store ArcObjects, such as ILayer, IField, etc. The compiler throws me a warning when using these kind of values public class ...
8
votes
3answers
4k views

ArcObjects (ArcGIS for Desktop and C#): How to cast between the ArcMap COM UI and my custom .Net UserControl objects?

I'm creating a utility to run in ArcGIS for Desktop using ArcObjects (9.3.1 SDK) and C#.Net. My prototype involves a toolbar with two comboboxes and a tool. The first combo selects a layer in the TOC, ...
8
votes
2answers
758 views

Why do I need ArcGIS Server just to host ArcObjects in a web service?

I get this question a lot from web developers, and would like to have a short concise answer for them ... Why do I need ArcGIS Server just to host ArcObjects in a web service?
8
votes
2answers
889 views

With arcpy, how do I detect relationship classes in a file GDB (or can't I)?

I would like to be able to detect relationship classes in a file GDB. Because users of my script might have only an ArcView level license, they would not be able to manipulate the schema of a feature ...
8
votes
2answers
636 views

What are mystery green lines in Layout View produced during ArcObjects script execution?

Could any of ArcObjects guru tell me, what are these green lines on my Page Layout and what to do, or not to do, so they do not appear? See image attached. I do used ArcObjects from Python. My script ...
8
votes
2answers
438 views

Is it possible to use a Multipatch to implement IFeatureRenderer.Draw in a custom renderer

I have a custom renderer which need to render modified geometry. The input features are all coming in via the IFeatureCursor as polygon elements. (This is similar to this example, though I'm not ...
8
votes
2answers
368 views

Run ArcGIS 10.1 application on 10.2

I support a .NET application that has been compiled on a PC with ArcGIS 10.1 installed. The application comprises a user interface and an ArcGIS desktop extension, plus an installer assembly that is ...
8
votes
2answers
259 views

How to efficiently (programmatically) determine whether two datasets have / don't have identical content?

Given: a geodatabase A that contains 100 datasets named a1 .. a100 a geodatabase B that contains 100 datasets named b1 .. b100 I want to programmatically (*) determine for each dataset pair (ai, ...