All Questions

0
votes
1answer
11 views

Using AJAX to run a PostGIS SQL statement and display result via GeoServer

I am learning Web GIS, and I can't find a good example that gives a big picture of a web interface of running spatial analysis using PostGIS. What I am looking for is a graphical/GIS version of ...
1
vote
2answers
84 views

How to resample polygon vertices so that they are evenly spaced in Arc 10

I have digitized the outline of many river channels (by both manually picking points and using streaming mode), but now I need the vertices to be evenly spaced (for input to another program). I tried ...
0
votes
1answer
6 views

Area of a polygon inside a a region

I am new to geographic information systems and i need to calculate the area of a a polygon ( a circle to be precise) that falls inside the boundaries of a region, say a state or a country. For ...
1
vote
1answer
21 views

Is there a QGIS theme/project selector?

I am switching from Mapinfo Pro to QGIS and have a question. In Mapinfo, I have coded a theme selector to turn on/off themes (workspaces) in a basemap, as shown below. Has anyone made a similar plugin ...
0
votes
0answers
5 views

I am trying to build a website which shows different satellite images but i am not able to understand how to go about it

basically i want to build website which shows different satellites images of cities and as i hover my mouse the lat/long should change. Sorry for such a basic question, as i am new to javascript, if ...
0
votes
0answers
2 views

Z-index in OpenLayers 3: layer ordering in OL3

Is there a method to cjange Z-indexes of layers in OpenLayers3 like it was in old version? map.setLayerIndex(markers, 99); //set the marker layer to an arbitrarily high layer index and I need to ...
0
votes
1answer
98 views

POI database of tourist attractions, or POI database with popularity index

I'd like to build a list of popular points of interest and tourist attractions for many/every city in the world. Is there any sort of dataset that I can use for this which either contains only popular ...
0
votes
0answers
3 views

ArcPad GPS Data Captured misaligned

Data captured using ArcPad 10 is not displaying properly. The .shp file created in arcpad is diplaying a NAD 83 Zone 17 projection. From what I've been reading, the datum for GPS is usually in WGS ...
0
votes
0answers
4 views

Masking clouds with Fmask

I have been trying to mask clouds with the quality control band with landsat 8 imagery. The problem I continue to run into is that the quality control bands mistake tops of buildings and concrete as ...
0
votes
1answer
26 views

Multiple Subsetting

Input File, XY min,max file I have a XYZ .csv file for a large portion of an area. I have another txt file which contains Box numbers, Xmin, Ymin, Xmax, Ymax. I would like to export a CSV file for ...
0
votes
1answer
248 views

QGIS 2.0 Python Error on startup in Ubuntu 10.04

I upgraded QGIS to 2.0.1 through the official repository in Ubuntu 10.04 64 bit version. It would start but would not load ftools and many other plugins. It would also not display the "Get more" ...
0
votes
0answers
8 views

Creating Triangulated Irregular Network (TIN) in QGIS?

I want to create a TIN and view it in 3D in qgis. The tin am creating using interpolation plugin is a raster TIN but i want the normal TIN(vector TIN).
1
vote
1answer
25 views

cadtool and spline plugins not working

Am trying to edit a line shapefile using a spline tool in QGIS 2.4.0 .Its drawing but the ok button is inactive. what could be the problem? Generally am trying to create a curved line.
6
votes
1answer
406 views

Display Feedback “Stutters” When Moving Features

I have a custom tool for moving features that implements IDisplayFeedback and geometry-specific CoClasses to show the user where they are moving the feature. IMovePolygonFeedback polygonFeedback; ...
0
votes
1answer
28 views

how to batch reclassify rasters with percents range

Using Model Builder I need to reclassify slope rasters with percents range value. I have read and ask here batch reclassify rasters with different elevation ranges, but I still need more explanation. ...
2
votes
1answer
62 views

MXDs don't open by double-clicking outside ArcMap, but do open from within ArcMap?

If I try to open any MXD by double-clicking it from Windows Explorer or ArcCatalog, ArcMap fails to open. I can see in Task Manager that ArcGISFileHandler.exe briefly runs, then closes, but ...
1
vote
1answer
123 views

UnicodeDecodeError: While installing gdal in a new Python Virtual Environment

I was trying to create a Python Virtual Environment for some initial GIS development. I installed pip and virtualenv and then tried the following commands from the Linux-Terminal to accomplish the ...
0
votes
0answers
13 views

How to plot the US maps with selected locations (longitude and latitude of the locations are known)?

I've been struggling with the following R plotting of the US map and wonder if any of you have suggestions on how the plot should be done. Here is what I have tried: US <- map("state",fill=TRUE, ...
2
votes
1answer
353 views

How to integrate Openstreetmap in Rails3.2 using Mongodb?

I'm planning to use Open street map in my Rails app to track locations, Can any one guide how to integrate Open street map with Rails 3.2, using MongoDB. Thanks
2
votes
0answers
16 views

How to put a piechart <Graphic> in <TextSymbolizer> of a Geoserver style?

I reckon that GeoServer layer label style has excellent feature of TextSymbolizer where text label can be positioned relatively on centroid of VISIBLE PART of polygon, as oppose to a geographically ...
3
votes
1answer
16 views

How to add link in ArcGIS Online web map popup to google or bing driving directions?

I have an ArcGIS webmap with school boundaries. I would like to provide a link in the pop up that takes a public user to a free routing website like Bing or Google with the directions to their ...
0
votes
1answer
32 views

Creating 3D Buildings for Google Earth?

I want to learn creating real 3D buildings to use them for google earth. What is the best software for that? And What are the best books/tutorials to start with. Thanks
1
vote
1answer
263 views

Using GeoServer with ArcGIS Viewer for Flex

I need to create a web GIS application using the ArcGIS Viewer for Flex graphical Appbuilder. Can I use it with GeoServer to publish my GIS data or is the viewer made exclusively for ArcGIS for ...
1
vote
0answers
11 views

Optimized interpolation method with fixed-location sample data points?

I'm trying to find an optimized spatial interpolation method that deals with fixed-location sample data points. Say if I have fixed-location sampling sites and collect data daily, and then use these ...
0
votes
1answer
12 views

Tree symbol style set?

I am looking for a set of 2d tree symbols style for a landscape plan. I got an old one trees.avi that I can't import to 10.0. Can anybody link me to one?
0
votes
0answers
21 views

Raster Analysis Grid (Interpolation) Crashes [on hold]

Upon clicking on "Grid (Interpolation)" QGIS crashes. I running QGIS 2.2.0-Valmiera on a Mac with OS X 10.9.4 Thank you for any trouble shooting guidance
0
votes
2answers
21 views

Measuring distances between many points in ArcGIS for Desktop?

So I'm new to this, the answer is probably really simple. I have a point map of X Y data points (one for each participant) for a certain activity. I also have a shape file of zip codes, which I ...
3
votes
1answer
809 views

How to use the pgRouting TSP function?

For more than two days I'm trying to make the TSP algorithm work in PostgreSQL/PostGIS. My problem seems to occur when I'm trying to take into account the road network for TSP algorithm. I know that ...
1
vote
0answers
7 views

how to make mapnik style raster, not just render as solid color

I have set up Mapnik with mod_tile and renderd. I replaced the default osm.xml file with my own xml file, which is shown below. My problem is that all images are being created as solid blue tiles as ...
1
vote
1answer
30 views

Sort colors from light red to dark red

I have the following png image displaying tanker traffic density: The colors are from dark red to light red, dark red means 'lowest density' and light red means 'highest density'. For example, the ...
1
vote
0answers
15 views

PostGIS Unknown colormap keyword

I'm working with thematic maps with ST_ColorMap function smoothly until I try to create my own thematic map(colormap). WITH canvas AS ( SELECT ST_Raster( ...
1
vote
1answer
44 views

ArcPy SearchCursor getValue leads to NoneType object has no attribute lstrip?

I am having a little bit of a dilemma. I am having a problem with using getValue() and striping the value that is returned. For instance, take the following code. import arcpy as ap mxd = ...
1
vote
0answers
16 views

How to build cylinder or cube multipatch objects in ArcGIS?

I'm trying to visualise a series of boreholes, which consist of points on the ground surface, and soil sample values taken at 0.01m depth intervals (in a related table). eg in this screenshot, I've ...
0
votes
0answers
6 views

return state of point from postgis / mapnik pgsql db

I realize that I can confirm whether or not a point lies within a state like this: SELECT ST_Contains(poly,pt) As testr FROM ( SELECT ...
3
votes
1answer
231 views

1944 Cyprus Grid coordinate data projection problem in MapInfo

I have coordinate data from the 1944 British Army General Staff, Geographical Section (GSGS) Cyprus map which was cast on the Cassini projection, but was referenced to the Clarke 1880 ellipsoid where ...
0
votes
1answer
9 views

GeoEvent Processor for Server Service Stopping

I have recently began using the GeoEvent Processor for server, It will run for one minute and then stop. I can't really intepret the logs to see what the problem is, and I am hoping a better eye than ...
1
vote
1answer
5 views

mapbox.js 1.6.2 - change tile set on zoom levels

var map = L.mapbox.map('map', 'wmarci.i6n42nl5', { fullscreenControl: true, fullscreenControlOptions: { position: 'topleft' } }).setView([38.8929,-100.0252], 4); How can I ...
2
votes
0answers
8 views

MapServer - Os Open Data - Tutorial

I have recently received my OS OpenData discs from Ordnance Survey, and for the last two evening tried to get this data into MapServer for ultimate use as a WMS for OpenLayers. Safe to say I have ...
0
votes
1answer
17 views

Prefer Straight Routes for wayfinding?

Is there a way to prefer straight roads in network analyst rather than going through zigzag routes (i.e creating straight forward routing instead of really going through the shortest path)? I am ...
0
votes
0answers
34 views

Why can't I permanently remove this vertex?

I'm correcting some data in ArcMap for import into another software. The export utility isn't liking some of the data, and the only difference I've noticed is extra vertices in the polylines. The data ...
1
vote
1answer
31 views

Closed Linestring

I've created a linestring using st_makeline(). When I draw this linestring using QGIS it always makes it closed. The start and end points are not the same and I verified by using st_startpoint() and ...
0
votes
2answers
12 views

rbind of list of selected point txt files

I have lot of Point files in a folder. I would like to rbind (Vertically One after another in a single txt file) as per the list of selected point file from all the point files present in the folder. ...
2
votes
0answers
6 views

When we create a CartoDB table using SQL, is there a way to register it with the tables dashboard?

I have been able to create tables that conform to the CartoDB style by the following method: Create empty table [table name], no columns via SQL API SELECT CDB_Cartodbyfy([table name]) via SQL API ...
2
votes
1answer
250 views

Creating buffers that will not overlap in QGIS

I am dealing with a .shp with a number of points in it. The distances between points range from ~300m to 5km. I wish to create a 1 km buffer around each point with as little overlap as possible. Each ...
0
votes
1answer
21 views

Geopandas/folium map not displaying

Good afternoon, I'm trying to use a combination of geopandas, pandas and folium to create a polygon map that I can embed incorporate into a web page. For some reason, it's not displaying and wonder ...
0
votes
1answer
13 views

Non Matching Rows

I need to compare 2 CSV files so that I can get the missing rows from each CSV. So I have 2 txt files and I would like to compare one with another and Vice versa. Please find the attached txt files. ...
1
vote
1answer
14 views

Trouble inserting name of feature in TOC into attribute table using arcpy.calculateField

I currently have about fifty rivers and creeks in a map, and none of the features contain the name of the waterbody. However, the features are named correctly in the table of contents Ideally, I ...
2
votes
1answer
155 views

Combining Geological Grids and extruding between them?

I have a situation where I have 3 Geological grids, each showing a different horizon + the Seabed Grid. I need to extrude between these grids in order to make the 3D polygon for the geological ...
1
vote
0answers
10 views

Error 000666, does not have OID with Locate Features Along Route in ModelBuilder

I'm trying to take a bunch of point data and determine what points of surveyed lines are closest to each point. To this end I have put together a model that loops through the line features and in ...
0
votes
0answers
4 views

Convert height Geoid EGM96 to Orthometric?

I'd like to convert the height data which is in EGM96 to Orthometric projection. Perhaps there are tools, like ArgGIS (I cannot find if ArcGIS can do this), or any formula that may help me.

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