Digitizing a city map for thesis project; Transportaion

So, basically I need a digitized map of a city that can be used for analysis. My thesis will be focusing on land-use destination, so I’ll be needing the fully digitized map that has all kind of land-use categories plus the road networks, precisely the measurement of accessibility. The biggest hurdle that I’ve came across is, as I belong to the third world country i.e. Pakistan, the nonavailability of data for GIS. Besides, I am not an expert in the GIS. However, I am major in urban planning.

Things that I would like to ask are:

  • How can I extract image for the study area?
  • How can I digitize the map in the fastest way?

How to calculate X and Y projected coordinate in batch processing

I have more than 1000 shape files (all are point features). They were initially in WGS 84. I projected them in UTM. Then through batch processing I added X, Y fields in each table. But all the X, Y fields are now empty or rather filled with 0. I need to calculate X, Y projected coordinate through batch processing and fill newly added X, Y fields. I checked in calculate field option for batch processing under data management tool. But don’t see any calculate geometry option there. Where can I find the tool in the tool box so that I can use it for batch processing all my tables to calculate X, Y in meters.
I am using ArcGIS

How to check whether an optional FeatureSet parameter was set by the user in a geoprocessing script tool?

I have created a custom geoprocessing script tool which contains an optional FeatureSet parameter.

When unpacking the parameters in the script, the FeatureSet is defined as a RecordSet object, even though no input was received. It seems to set a default value if it was not entered.

I need to check if this parameter was specified by the user or not.

For example, when I run this through ArcMap without a FeatureSet parameter the following occurs:

exportAOI = arcpy.GetParameter(3)
arcpy.AddMessage('AOI is: ' + str(exportAOI))
# AOI is: <geoprocessing record set object object at 0x14133578>

I was expecting exportAOI to be None.

How can I determine whether the user actually set this type of parameter?

Controlling Python Version from ArcGIS?

I am writing a VB.net console application that calls ArcGIS Desktop 10.1 ArcToolbox geoprocessing tools from my code. Some of these tools use Python syntax and I am encountering a problem that I suspect is caused by conflicting architectures. Is there a way to control which version of Python that ArcGIS uses?

  • System: 64 bit Windows 8.1
  • ArcGIS: 32 bit ArcGIS 10.1 Service Pack 1
  • Python: Both 32 and 64 bit versions installed (latter from ESRI’s background processing download)
  • My App: 32 bit VB.net (not Any CPU) console application.

finding the geographical co-ordinates

I have two circles C_1 and C_2 on the surface of the earth(sphere) intersecting at two points A and B given by latitude and longitude values. The center of C_1 lies in C_2 and vice versa.

I want to find the co-ordinates of points diametrically opposite to each centers.

How do we calculate the converse?

How to generate automatically the name of output parameters in a python script tool?

I have some Python script tools in ArcGIS for Desktop.

I need to reproduce what all geoprocessing tools do when the first input parameter is introduced: autogenerate a workspace and basename for the outputs.

How can I do that?

Meaning of red cross icon next to Geoprocessing tool/model?

I am using ArcGIS 10.1 for Desktop.

When I double-click on the toolbox command line, it is not working and appears as a red cross symbol in command tool icon.

So please, what can I do?

How to work with shapefile with 110,000 points?

I have a very large shapefile. It has 110,000 parcels, represented as points.
I’m not trying to do anything too advanced with it. Here’s what I want to do:

  1. Join it with an Excel file, export it as a new shapefile (unless there’s an easier way to incorporate the joined attributes into a shapefile)
  2. Use the identity tool to group the parcels into census tracts
  3. Use the field calculator to create a Boolean variable of sorts. I just copy and paste one column into a new field, and turn a value into 1 and all other values into 0.

The computer I’m using right now has i7-3770 and 16 GB of RAM, so I don’t know why ArcMap 10.1 would not respond when I’m trying to do any of those things.

If there is a way for me to do those things listed above without crashing the software, I’d like to know. Thank you.

how manage mysql spatial polygons in parent child style

I want to store location-polygon data in a parent-child relation. I am using spatial data in MySQL and Google map for polygon.


  1. World
    • 1.1 US
    • 1.2 China
    • 1.3 Japan
    • 1.4 South Africa
      • 1.4.1 Pretoria
      • 1.4.2 Cape Town
    • 1.5 India
      • 1.5.1 New Delhi
      • 1.5.2 Chennai

Table in mysql:

  `g` geometry DEFAULT NULL,
  `location` varchar(100) NOT NULL,
  PRIMARY KEY (`id`)

My questions are:

  1. How can I identify India is the parent of New Delhi?

  2. How to get children of India?

Any spatial query?

Result Window in ArcGIS 10.1 is not Opening

I booted up ArcMap 10.1 today and found out the Results Window was not opening up.

Background info:

  • ArcMap is running through a virtualization program through at my company.
  • Similar issue has came up in the past but with the search window not showing up.
  • IT couldn’t figure out what caused the issue with the search windows not opening up so they uninstalled the virulization program cleared the cache associated with ArcGIS.
  • I noticed whenever I click on Geoprocessing->Results (I have also added in the results button through customization), the right edge in the following image blinks.
  • I noticed a windows update went through last night so that may be the culprit? Then again, how did the search windows get borked?

I’ve scoured stack-exchange/internet and could not find any info relating to this issue. Tools successfully run and I can view the history log as mentioned here but i really need to view the results window so I can rerun various tools again without filling out the parameters again.

Does anybody know of any registry keys/services that I can look into that that may need to be tweaked?

I don’t want to resort to IT since I know for a fact they will uninstall everything, in turn loosing all my defaults e.g. shortcut keys, toolbars, and document customization.

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