gis

How to add Tool from ESRI resource center (Web ADF) to GeoCortex Web ADF Application

I have an Out-Of-The-Box GeoCortex Web ADF application and I want to add The Hyperlink Tool (see below link). I Should be able to do this but GeoCortex does not have any great documentation for this. Who can help me here?? Thanks in advance. http://resources.esri.com/arcgisserver/adf/dotnet/index.cfm?fa=codeGalleryDetails&scriptID...

Convert latitude and longitude into northings and eastings

Hi I have the following UK postcode dy8 3xt and know that the latitude and longitude is:- 54.452772 -2.156082 I also know that the Eastings, Northings for the postcode is:- 389490 283880 However I am struggling to find the equation that converts lat/long to northings and Eastings, I would prefer to have the equation in both in ...

Common Mercator Projection formulas for Google Maps not working correctly

I am building a Tile Overlay server for Google maps in C#, and have found a few different code examples for calculating Y from Latitude. After getting them to work in general, I started to notice certain cases where the overlays were not lining up properly. To test this, I made a test harness to compare Google Map's Mercator LatToY con...

How can we calculate sea distances using waypoints ?

Hi Friends, I have one query in which I really stuck at that. I have port database with waypoints and also routing points which I need to use in distance calculation between two ports. I have done lots of R&D to find formula which gives me distance between two points. I also need shortest route which is possible. I have reviewed online...

Get countries within range of LAT/LONG coordinates

Trouble! I'm looking for a way to find the countries within a given range of LAT/LONG coordinates. E.g.: When viewing an area in Africa using Google Maps, I get out which countries that are in my current view. This is a bit ambitious, and I think the main problem will be dealing with accuracy of the needed polygons. The accuracy of t...

Displaying decimal degrees..

I have a Web Application that displays a Map Service that is in NAD 1927 UTM Zone 15N. I have JavaScript code that displays the XY in status bar based on where mouse cursor is on that map. I want to display Latitude/Longitude values instead. Does anyone know how? ...

Draw line in Google Earth that takes account of the globe's curvature

I want to draw some lines that would follow either the longitude or latitude, but it doesn't take the globe's curvature in account. How would I go about doing that? I'm using KML. ...

Mapserver mapinfo styling

Is it possible to use mapinfo embedded graphic style for features with mapserver? I don't want to describe again width and color of lines, polygones and so on. ...

How can I convert a projection that's not part of spatial_ref_sys?

Hi, I'm importing shapefiles into a Postgres+PostGIS database. Here's my usual procedure: * Find an srid in the spatial_ref_sys table where srtext appears to match the shapefile's .prj file * Upload the data into a new table using the shp2pgsql utility, specifying the srid using the -s flag * Add the new table to my main geometry table...

Mapping Application for Middle East

We have a desktop application that has been using MapPoint for displaying data on a European map. We now want to support Middle East maps, but MapPoint only support North America and Europe. Is there any other alternative to MapPoint that can be easily integrated in a .NET based Win Forms application? ...

Need a list of all countries in the world, with a longitude and latitude coordinate

I need a list of all the countries in the world, with one lat/long coordinate for the country. I had a look at GeoNames, but all I can seem to find are lists that have the countries as well as cities in the same list. I guess I can just parse it and filter out the countries, but I was hoping to avoid that. Basically, what I need; Coun...

Open source GIS tools

Hi I’ve been looking at Open Source GIS tools. In particular MapServer and GeoServer. The problem I’m seeing is that to actually deploy these to the public you can’t use a regular $5/ month (or free) hosting service because you have to install these services on the server in ways that are not accessible in the average hosting scheme. S...

Good examples of MapServer / OpenLayers

I want to convince some clients to use MapServer and OpenLayers. Please can anyone suggest attractive websites to show off the possiblities! The clients will be impressed by: A density map (otherwise known as a heat map, colour-shaded grid coverage, contour plot...). The ability for the user to download the underlying data for the ...

Including the SRID in SQLLDR file exported from Intergraph Geomedia

The company I work for uses Intergraph Geomedia, and we have some data in an Access database using Geomedia's native geometry stored in a blob format. Geomedia has an export capability that outputs to a SQLLDR format for Oracle that I'd like to use, but I can't get it to include the SRID in the loader file. It just puts a space. Anyon...

VBScript Condition Value from Column

Hi! I am using VBScript in a Manifold GIS Database to verify the distance between two longitude and latitude points using Trig function. The script for finding the distance run without any problems but the script for verifying whether the O-D is valid had syntax error. I really hope any of you could help me with this problem. There were...

Grails GIS Application

Hello, I'm working on an internal IT application monitoring outages for a network with a national footprint in the US. I'm considering overlaying outages by region on a map. Showing outage areas in red for example. The user clicks on the outage area displaying drill down information. The technology stack includes Grails/JBoss/Linux. Are...

Geocoding service for a startup?

I'm working on an idea for a service that uses geocoded data (lat/lng) form a US address. Google maps API v3 has been awesome, until I read the terms of service and acceptable uses a little closer. The problem is that the terms seem to prohibit use of the maps API for any commercial use where the site is not freely accessibly to the publ...

Link to Google Streetview using Lat/Long

I'm trying to make an app that links to Google streetview using latitude/longitude coordinates, and shows a streetview of the nearest road. This is coming from a fairly small and well covered area, so there isn't going to be any coordinates in the middle of the ocean. Is there a published API showing the get parameters you need to link ...

GIS: Converting multi polygons to multiple features

Hi, I am involved in a GIS project. I have a base map file (shape file) that contains the road layer for a large portion of a town. The problem is that the shape file contains only two features each containing around 500000 points each. The features are multipolygons containing a large no of polygons inside. I wish to convert it to numer...

How to very efficiently assign lat/long to city boundary described by shape ?

I have a huge shapefile of 36.000 non-overlapping polygones (city boundaries). I want to easily determine the polygone into which a given lat/long falls. What would the best way given that it must be extremely computationaly efficient ? I was thinking of creating a lookup table (tilex,tiley,polygone_id) where tilex and tiley are tile id...