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Questions & Answers

ArcView

Questions:

001    -    Why can't I link a shapefile to an access database and have the linked records show up in the table of the shapefile being linked?

002    -    My data table links with neither an access database NOR a GeoDatabase. Why won't it link?

003    -    I have lines that were digitized in one direction, and I want them to show that they were digitized in the opposite direction.

004    -    Can I "cut a hole" in an existing polygon using ArcMap 9.2?

005    -    How can I use LAS (LiDAR) files with ArcMap?

006    -    I keep making changes to my address-range street centerline data layer, but when I go back to look up an address I know I made a part of the data, I cannot find that address! What am I doing wrong?

007    -    Data Frames in Layouts are sometimes confusing...any documents to help?

008    -    How do I create a data layer from a graphic?

009    -    Can I view Attributes of my data with the new HTML pop-ups?

010    -    Two ways to create Hyperlinks / Hyperlinking to a specific page in a multi-page PDF Document.

011    -    How to clip an image.

012    -    Exporting maps to a PDF file format and retaining information.

013   -    Can I represent a point on my map with a picture?

014    -    Are there any quick ways to change the case of the text in the  field I want to label from?

015    -    I would really like to make viewing tables easier; any suggestions?

016    -    Now that the Aerial Photography is available for the entire state of Ohio, why can't I show two counties together at the same time and have the boundaries math up correctly?

017    -    It can be frustrating trying to create a field in a table that is numeric, making sense of the "Precision" and the "Scale".

018    -    Labeling Numeric Fields in ArcMap 10 - Hints!

019    -    Troubleshoot Joins in ArcMap 10

020    -    Using HTML Popup

021    -    Using DRA - Dynamic Range Adjustment

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Answers:

001    -    Why can't I link a shapefile to an access database and have the linked records show up in the table of the shapefile being linked?

    This is a glitch that has become apparent in ArcView 9.2, and can be maddening at times. The BEST solution is to import the access database into a GeoDatabase, and link your shapefile to the GeoDatabase. It should be noted that the field names in your table (in Access) should not have any special characters', such as @ or &, and should not have any spaces in the table names.

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002    -    My data table links with neither an access database NOR a GeoDatabase. Why won't it link?

    There are a number of things to look at, but first and foremost, the table names in Access must not begin with a number or with a special character. If one table is numeric, the other one your linking to MUST BE numeric also. If one is TEXT the other must be text; you cannot link fields that are not the same data type.

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003    -    I have lines that were digitized in one direction, and I want them to show that they were digitized in the opposite direction.

    This is more common than some might think, and comes up when users want to change the direction of address ranges on a street, when they want to show the direction of water flow with lines, or even in the case of digitizing one-way streets. The key word to remember is FLIP. You flip the line to point it in the opposite direction from where it is; click here for a screenshot. Select the feature to be flipped, click on modify feature in the task pull-down list, and hit the flip button. There are also scripts that can be downloaded from www.esri.com that address questions such as this and many others.

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004    -    Can I "cut a hole" in an existing polygon using ArcMap 9.2?

    1. Open the Snapping Environment dialog box and turn on snapping for edit sketch vertices. The check box is at the bottom of the dialog box. With edit sketch snapping, you can better construct a closed boundary defining the area you want to remove.

    2. Set the task to Cut Polygon Features.

    3. Click the Sketch tool

    4. Sketch the area you want to remove. Make sure the end vertex snaps to the first one, so you end up with a closed polygon.

    5. Finish the sketch.

    6. You now have two polygons. Select only the inner polygon, then press the Delete key.

To use an existing overlapping polygon for the shape of the hole, use the Clip command. When using this method, keep in mind that all editable features underneath the feature you are using to clip with will be clipped.

    1. Select the inner polygon.

    2. Click the Editor menu, then click Clip.

    3. Set the buffer distance to 0 and choose to discard the area that intersects.

    4. Click OK.

    5. Delete the inner polygon.

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005    -    How can I use LAS (LiDAR) files with ArcMap?

The only way you can use LAS files is to convert them to a Multipoint, using ESRI's 3D Analyst. Refer to the GeoCue web page for downloadable readers and viewers. Also refer to the LiDAR page for more information; the Class Description is a key piece of information in using LAS data with the 3D Analyst. Click here for Q & A on 3D Analyst.

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006    -    I keep making changes to my address-range street centerline data layer, but when I go back to look up an address I know I made a part of the data, I cannot find that address! What am I doing wrong?

You must update the geocoding index file after you make changes to your address-range data; otherwise those changes will never be reflected in address searches.  screenshot

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007    -    Data Frames in Layouts are sometimes confusing...any documents to help?

This document should be of great value in helping to understand the complexities of Data Frames in Layouts.

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008    -    How do I create a data layer from a graphic?

Click here to view a PDF file of a page from the ESRI.

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009    -    Can I view Attributes of my data with the new HTML pop-ups?

Click here to view a PDF file of a page from the ESRI.

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010    -    Two ways to create Hyperlinks / Hyperlinking to a specific page in a multi-page PDF Document.

Please take a look at this document.

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011    -    How to clip an image.

There are a couple of different ways users of ArcView can clip out a small image from a larger dataset.  One is to use the ArcPad tools; another is to use Spatial Analyst.

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012    -    Exporting maps to a PDF file format and retaining information.

Please read this article for more information.

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013    -    Can I represent a point on my map with a picture?

Yes, it is an easy process to make a point on a map a picture of any graphics, including pictures. Please read this article for more information.

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014    -    Are there any quick ways to change the case of the text in the field I want to label from?

Yes, please review the procedures found here.

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015    -    I would really like to make viewing tables easier; any suggestions?

Yes, this article here provides some pertinent information.

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016    -    Now that the Aerial Photography is available for the entire state of Ohio, why can't I show two counties together at the same time and have the boundaries match up correctly?

This is not a question of the counties photography not "matching up", it is because the way in which the MrSID files (the photography) is created.  When displaying two counties in ArcMap, one will be "over top" of the other....you will be able to see that "invisible" boundary blocking out a good portion of the other counties photography....

Boundaries Showing:

 

Boundaries Not Showing:

It is not quite seamless in the second image, but is close. The procedure to do this is as follows....

1.  Select the photography that is ABOVE the other counties photography in the Table of Contents.

2. Click the right mouse button.

3. Click on the Symbology tab.

4. Refer to the image below....

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017    -    It can be frustrating trying to create a field in a table that is numeric, making sense of the "Precision" and the "Scale".

A good example is "1234.56". How do you create it?

1.  First - when you add a field choose "double" as the type.

2.  In "Precision" field  you put the total number of digits you want the field to hold, including decimals.

3.  In the "Scale" field you put the number of digits you want to the right of the decimal.

For our example of 1234.56, the precision would be 6 and the scale would be 2.

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018    -    Labeling from a Numeric Field - Hints!

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019    -    Troubleshoot Joins in ArcMap 10

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020    -    HTML Popup

Using the HTML Popup to launch our online, Auditors Office Interactive Mapping web page and display the Property Record Card from the clicked-on record. The Property Card is a PDF file that can be saved to a local computer.

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021    -    Using Dynamic Range Adjustment

Using version 10 of ArcMap, Image Analysis tools

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