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I have 4 Fields. FFE,year10,year50,year100 I created a 5th field and labeled it - CP I need help writing a python script in field calculator to fill the column CP with whatever FFE is closest to out of year10, year50, year100. Example: FFE = 45 year10 = 35 year50 = 51 year100 = 60...

Can I overlay two separate maps for print purpose only? I need both to have different color location points etc. Am I missing something simple? أكثر...

I try to use qgis to create a custom topographic map for outdoor use: UTM, 1:50000. What these maps usually have is a 1km x 1km grid, which at the bottom is labeled with a shorthand for the corresponding UTM grid coordinate: Say the UTM easting of a vertical line is 05532000, then I'd label...

I am trying to select the largest polygon that contains each feature in a feature class but none of the features in another feature class. I have written the code that seems logical to me but (of course) it doesn't work. I am using a search cursor to iterate through my first feature class and...

I'd like to integrate an UI file as a form in QGIS 2.8. The UI file is created in QT Designer. One of the attributes in the attribute table is a filepath to an image. I'd like to display the picture in the form instead of the filepath. I created lineEdits for each attribute and named them...

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I have a ZIP3 boundary feature class that contains roughly 900 records. I then have a table in a geodatabase that has 21000~ records and a ZIP3 field. How would I go about making a feature class that has the ZIP3 boundaries for each of the 21000~ records from my table? أكثر...

I'm currently running a webapp locally that stores/caches data in MapDB format. I would like to play with the data in PostgreSQL. Do there exist tools to convert the .db files to other formats? أكثر...

I am using data driven pages to export 300 maps into PNG-files. I would like to name every exported PNG-file based on information from a column in the attribute table. What is the code for that? The code I´m using (which doesn´t work properly) is below: mxd =...

If you are a web developer, you’ve probably been waiting for Web Components to become the de facto standard for UI in your web apps. We all have. This recent talk from Forward 3 encourages using web components now, but not in the way you’d think. Basically almost every framework is using some...

when importing a new shapefile in pathfinder office to later be exported to the trimble geoxt, and selecting the option to import with an existing data dictionary does there need to be some common unique ID? What connects the the data dictionary to the new shapefile? Do I need to enter all of...

I'm trying to use the MOD function to select even/odd attributes using this formula: MOD ("L_F_ADD", 2) = 0 or = 1 for odd. L_F_ADD is one of the address fields I am using for road center-line data. I had no problems with this formula until I upgraded to Arcmap 10.3.1. Not it doesn't work...

I want to calculate the number of vacant lots within 300m from a given residential property, i.e. "There are 3 vacant lots within a 300m radius from property X." My source file containes both residential property and vacant lot data as point layers. Here's a short description of my workflow...

I am very confused! I have tried this afternoon to create a polygon of a set size, namely 30m x 1.8m. I need 33 of these set over a grid (which I have created on a vector layer). I've read everything I can on the forum and tried and failed to use several plugins to do it (e.g. ArcheoCAD...

I want to create a new .style file in ArcMap. Under the Style Manager windows, I create a new empty "Style". Then, in the "Symbol Property Editor", I can add a "Picture Marker Symbol". But I can only add the symbols one by one. But, I have at least 700 pictures, and It is not possible to add...

At this post we are going to see a new utility of the geopy library, where we’ll see how to convert a table with addresses to a point layer in gvSIG. The addresses will be searched in Google Maps, so … Continue reading → أكثر...

Python, GIS and stuff has just been revamped with a more modern theme (check the sidebar for top posts and details on how to subscribe for new posts)! I have also gone over every single post to make sure the information is as clear and as accurate as possible, and work has started on new...

Discover how to leverage your full GIS capabilities in the field in Chapter 8 of The ArcGIS Book With mobile GIS, your GIS maps and apps go with you wherever you go. The integration of the smartphones and tablets with GIS has many implications. For example, you can collect data in the field and...

I have a parcel layer and a trees layer, I want to label each parcel with the number of trees it contains and the sum of DBH. I wrote a script that calculates this and it works stand-alone, but I can't figure out how to get it to work with a Label Expression. Here is the code I've tried (ArcMap...

Is there a possibility to create a multiline object from polygon object contours in ArcMap? I found that Edit toolbar allows to create polygons from other shapes, but I couldn't find anywhere an option to create linear object from polygon.If not in ArcMap, is it doable in ArcGIS Pro...